How to Add a Longer-Lasting Battery to Your Smartphone

Well, it’s noon and your phone’s battery is already at 37 percent. There are ways to avert this disaster, adding more battery capacity to your favorite smartphone.

Option 1: The Battery Case
The first option you can choose is a battery case. This is exactly what it sounds like. It’s a case you put your phone in — like a typical case designed just to protect your phone — but the case is thicker than normal and includes a built-in battery. The case itelf plugs into your phone’s charging port, and you generally plug the charging cable directly into the case’s charging port when it’s time to charge both your phone and the battery case itself.

Technically, this is just getting a separate battery and carrying it around with you. In practice, a battery case gives your phone more battery power at the cost of increased thickness. The case just becomes part of your phone — you don’t need to carry a separate battery pack in your pocket and attach your phone to it via a cable when it’s time to recharge. Just flip a switch and the battery pack will charge your phone with the power from its own battery. The battery pack can even be charged at the same time you charge your phone, so it’s not even a second device to charge.

This is probably the ideal option for most phones if you consistently need more battery power to make it through a day. Mophie’s line of iPhone battery cases are probably the most well-known, but Mophie has also made cases for other smartphones. They’re not the only company that’s made battery cases, either. Just be sure to get a battery case designed for your specific model of phone so it will fit! Search on Amazon or a similar website and you’ll find many battery cases to choose from.

Option 2: The Aftermarket Battery Replacement
Most phones don’t have user-replaceable batteries anymore, but some do. Samsung’s line of Galaxy phones stand out here, with even the high-end Galaxy S5 and other S-series phones offering user-replaceable batteries. Because these batteries and the entire plastic back panel of the phone can be removed and replaced, it’s possible to get aftermarket batteries that are larger, complete with new back panels to accomodate them.

If you have a phone with a user-replaceable battery, you can probably buy a larger replacement battery for it. The battery and its accompanying back replace your phone’s existing battery, so it’s a more effective solution than a battery case with a battery separate from your phone’s battery. Perform a search for “extended battery” and the name of your phone to find one. For example, you can pick up third-party extended batteries that promise three times the battery life for your Samsung Galaxy S5 for $40 or so on Amazon.

As with a battery case, this will make your phone thicker and larger. Whether that’s worth the trade-off is up to you — if you struggle to make it through a day with your phone’s current battery, it probably will be worth it. But, whatever you do, don’t buy super-cheap battery replacements.

Option 3: Just Carry Around a Separate Battery Pack
There’s also the external battery pack option. Rather than replacing your phone’s battery or adding a battery case, you can just carry a separate battery pack around with you and connect it to your phone with a cable whenever you need to charge your phone away from an outlet. This has the benefit of ensuring your phone stays thin, and you can use the battery pack to charge other devices that might need more power — a tablet, for example.

Editor’s Note: for our recent trip to CES 2015, we bought this RAVPower external battery pack and it worked amazingly well. We were able to recharge an iPhone 6 repeatedly throughout the trip without having to recharge the battery pack at all.

But there are downsides here. The battery pack is yet another thing you have to carry, so it’ll be difficult to pocket and will be more at home in a bag. You’ll have to connect it to your phone via a cable, so you can’t just tuck your phone into your pocket normally and have it charging as you could with a battery case. You’ll also need to charge your battery pack separately, so it’s yet another thing you have to charge at the end of the day.

Still, a battery pack isn’t a bad option. If you only need the extra power for your phone occasionally, it’s a good option you can take with you if you know you’ll be using your phone a lot on a particular day. On days when you won’t be using your phone much, you can take your still-thin phone with you and leave the battery pack at home. However, if you struggle to make it through every single day with your phone’s battery, a battery case or extended battery is a more convenient option you can always take with you and always have in your pocket.

Charging your phone throughout the day can also help. Whenever you’re using your computer, you can plug your smartphone into it via its charging cable — the one with a USB connection — and your phone will charge from the computer. There’s no memory effect with modern batteries, so regularly topping your phone off throughout the day won’t actually damage the battery.

All Cell Phone Battery in here, such as Acer,LG, Apple, Lenovo and Samsung Cell Phone Battery and so on.

Debunking Battery Life Myths for Mobile Phones, Tablets, and Laptops

Batteries need to be cared for properly — they’re a critical part of our mobile devices and battery technology hasn’t advanced as fast as other technologies. Unfortunately, there’s a lot of incorrect information about batteries out there.

Some of the big myths come from old battery technologies and are actively harmful when applied to new battery technologies. For example, nickel-based batteries needed to be fully discharged, while modern lithium batteries shouldn’t be fully discharged.

Perform Shallow Discharges; Avoid Frequent Full Discharges
Old NiMH and NiCd batteries had a “memory effect” and had to be completely discharged from 100% to 0% to keep their capacity. Modern devices use Lithium Ion batteries, which work differently and have no memory effect. In fact, completely discharging a Li-ion battery is bad for it. You should try to perform shallow discharges — discharge the battery to something like 40-70% before recharging it, for example. Try to never let your battery go below 20% except in rare circumstances.

If you were to discharge your battery to 50%, recharge it, and then discharge it to 50% again, that would count as a single “cycle” with modern Li-ion batteries. You don’t need to worry about performing shallow charges.

There’s only one problem that shallow discharges can cause. Laptops can get a bit confused by shallow discharges and may show you wrong estimates for how long your device’s battery will last. Laptop manufacturers recommend you perform a full discharge about once per month to help calibrate the device’s battery time estimate.

Heat (and Cold) Can Damage Batteries
Heat can reduce a battery’s capacity. This affects all types of devices — even smartphones heat up when performing demanding tasks — but laptops can become hottest of all when under load. The battery is in the laptop, near the electronics that become hot while working heavily — this contributes to battery wear.

If you have a laptop that you use plugged in all of the time and it gets quite hot, removing the battery can increase the battery’s life by limiting the battery’s exposure to the heat of your laptop. This won’t make too much of a difference in normal use, but if you’re using a laptop to play a lot of demanding games and it’s heating up quite a bit, it may be helpful. Of course, this only applies to laptops with removable batteries.

Your climate is also a concern. If it gets very hot where you live or you store your device somewhere that gets very hot — say, a hot car left in the sun on a summer day — your battery will wear down faster. Keep your devices near room temperature and avoid storing them in very hot places, such as hot cars on summer days.

Extreme cold temperatures can decrease the lifespan of your battery, too. Don’t put a spare battery in the freezer or expose any device with a battery to similarly cold temperatures if you’re in a region with cold temperatures.

Don’t Leave the Battery At 0%
You shouldn’t leave the battery in a fully discharged state for very long. Ideally, the battery wouldn’t discharge all the way to zero very often — but if it does, you should recharge it as soon as possible. You don’t have to race to a power outlet when your smartphone dies, but don’t throw it in your drawer and leave it there for weeks without charging it. If you let the battery discharge completely and leave your device in a closet, the battery may become incapable of holding a charge at all, dying completely.

Store Batteries at 50% Charge
On the other hand, leaving the battery charged fully for an extended period of time could result in a loss of capacity and shorten its life. Ideally, you’d store the battery at 50% charge if you weren’t going to use it for a while. Apple recommends you leave the battery at 50% if you intend on storing the device more than six months. If you’re using it regularly, you shouldn’t need to worry about its state — although you never want to leave a battery at 0% for too long.

Storing the battery while fully discharged could result in the battery dying completely, while storing the battery at full charge could result in the loss of some battery capacity and shorten your battery’s life.

This applies to both batteries in devices and spare batteries you may have lying around — keep them at 50% if you won’t be using them for some time.

Leaving Your Laptop Plugged in All The Time Is Okay, But…
This one appears to be fairly controversial. We’ve previously covered the eternal question of whether it’s okay to leave your laptop plugged in all the time. We concluded that it’s okay and the battery’s temperature is the main thing you need to worry about. Apple disagrees, recommending against leaving its Macbook Air and Macbook Pro notebooks plugged in all the time.

Ultimately, we’re both saying the same thing. It’s fine to leave your laptop plugged in at your desk when you’re using it, as the laptop won’t “overcharge” the battery — it will stop charging when it reaches capacity. However, just as you shouldn’t store your laptop’s battery at full capacity in a closet, you shouldn’t leave your laptop plugged in for months on end with the battery at full capacity. Allow your laptop’s battery to occasionally discharge somewhat before charging it back up — that will keep the electrons flowing and keep the battery from losing capacity.

Battery University says that “the worst situation is keeping a fully charged battery at elevated temperatures.” If your laptop produces a lot of heat, removing it might be a good idea. If you have a fairly cool laptop that you occasionally let discharge a reasonable amount, leaving it plugged in — even for days on end — shouldn’t be a problem. If your laptop gets extremely hot, you may want to remove the battery, as we mentioned above.

Batteries Will Always Wear Down
Like all other types of batteries, Li-ion batteries will wear down over time, holding less and less charge. Apple says its laptop batteries will reach 80% of their original capacity after “up to” 1000 full discharge cycles. Other manufacturers commonly rate their batteries 300 to 500 cycles.

The batteries can still be used after this point, but they’ll hold less electricity and will power your devices for shorter and shorter periods of time. They’ll continue losing capacity the more you use them. Heat and aging will reduce the battery’s life, too.

Whatever you do, your devices’ batteries will slowly wear down over time. With proper care, you can make them hold a long charge for longer — but there’s no stopping entropy. Hopefully, your device will be due for an upgrade by the time its battery dies.

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How to Choose a Replacement Battery for Your Cell Phone

Most modern cell phones are more than just a communication device; they also serve as a navigation system, a Web browser, a handheld game system, a music player, a day-planner and much more. It’s getting harder and harder to get by without one of these multifunction cell phones. But running all those applications uses a lot of battery power.

Even with cell phone accessories like car chargers and emergency chargers, your battery power may not last long enough. Over time, your cell phone battery will start to degrade and battery life will shorten. When a cell phone battery starts to degrade, you may think of replacing your cell phone altogether. But if your cell phone is still fairly new, it may be less expensive to buy a replacement battery. This guide will help you choose a replacement battery for your cell phone.

Choosing a Replacement Battery:
1.Review your cell phone information.
To get the right type of replacement battery, you will need to know what kind of cell phone you have and what kind of battery is suitable. Most cell phone carriers rename the cell phones that they carry. You need to know the actual name and model number of your cell phone, not the cell phone’s carrier-assigned name, to find a replacement battery. This information can be found in your user manual. You may also want to write down the IMEI number and the battery type and serial number. You can also find it on the inside of your cell phone, usually on a sticker or plaque underneath the battery. Also, review your cell phone purchase information. Many cell phone companies offer a one-year warranty for batteries.

2.Contact your cell phone manufacturer.
You can get cell phone manufacturer information easily on the Web. Ask them if they offer any warranty on the battery or cover the cost of a replacement battery. If they agree to pay for a replacement battery, they may ask for a proof of purchase to reimburse you. Also, don’t forget to check with your cell phone carrier or your cell phone manufacturer to see if using a third-party replacement battery voids the warranty.

3.Purchase a replacement battery.
If both the manufacturer and the cell phone carrier refuse to send you a replacement battery, you will need to find your own battery. You may find batteries made by both the original manufacturer and third-party manufacturers. Do your research before buying. More than one kind of replacement battery might be made with inferior materials or a low percentage of the active ingredient, have less battery power than a quality-made battery or have a short battery life. You don’t want to wind up purchasing another replacement battery in a few months.

Cell Phone Battery Tip
Remember to always dispose of your old cell phone battery by recycling it properly. Search online for places in your neighborhood that recycle dry-cell and rechargeable batteries. There are plenty of free recycling services to help you reduce your environmental impact.

How to Charge a Battery Without a Charger

Have you ever had a dead battery in your camera at just the moment when you need them most? Worse still is a dead cell in an emergency situation. And you can’t always carry a charger with you. For those who like to (or need to) improvise, these recommendations may prove useful.

Using a Battery to Charge a Battery
1.Remove the battery from the device. You will need access to the connection points on the battery. Keep in mind that the battery is not intended to be accessed on certain models of cell phone, so know what can be done with the model you have. On most (but not all) Android and Windows phones the back can be removed with the appropriate amount of pressure in just the right spot. Do not attempt this with most Apple products.

2.Find some AA, AAA, or 9-volt batteries. Unlike the power that comes from the wall outlet (alternating current), the power in common household batteries is no different from that used by your cell phone or camera battery.

Perhaps you are baffled that anyone would suggest using one battery to charge another. Maybe you were expecting some magic trick that would allow you to add charge to your battery without having to find an alternate source of electric power. In fact, that is not possible. One of the fundamental laws of physics (the law of conservation of energy/conservation of mass) makes clear that you can’t get something for nothing.Deal with it.

It is recommended that you charge your battery rather than attempt to hotwire your electronic device and use the alternative batteries directly. Using the improper amount of amperage or voltage can potentially damage complex circuitry, so such methods are obviously not worth the risk.

3.Identify the positive and negative connectors on each battery. On the AAs and other household batteries, these will be marked. For most cell phone batteries, the positive connector will be the one closest to the edge, while the negative connector will usually be the one farthest from the edge (there may be three or four connectors, but the middle one or two are used for temperature regulation and other functions).

4.Match voltage of your battery which need to charge and other battery (AA, AAA or others with enough power to provide). Normally now a day’s Cellphone battery needs more than 3.7V DC to get charged. So multiple AA or AAAs or one 9V battery will be idle for providing a charge. Keep in mind that normal AA or AAA battery on everyday household use provide 1.5V each. So to gain more than 3.7V, you need 3 AA or AAA battery connected in series. 1.5V + 1.5V + 1.5V = 4.5V would be your power source if battery on your hand is either AA or AAA model.

5.Obtain two pieces of metal wire. Ideally, these will be covered in plastic insulation except for exposed ends.

6.Tape or clamp the wires to the battery that will be providing a charge and the battery that requires a charge. These wires may get hot (though most likely they will not if you are doing it properly). It will also take quite a long time to transfer the charge. You don’t want to be holding them the whole time.

If you are using AA and AAA batteries; you may want to connect them to each other “in serie” before attaching them to the battery requiring a charge. This means using wire to connect the negative side of all the small batteries to the negative connector on the battery that needs a charge, and the same for the positive side.

7.After some time, the battery should be charged. Keep in mind that it probably won’t be fully charged, but you should have at least some use of the device that you needed.

Using the Rubbing Trick
1.Remove the battery from the electronic device. Hold it in your hands.

2.Rub the battery hard by using both of your hands to generate enough friction and heat. Continue to do this for 30 seconds to several minutes.

Note: Your battery is not being recharged. Some internet commentators have suggested the rubbing the battery provides it with additional charge, perhaps from built up static electricity.
This interpretation is entirely incorrect.

Lithium ion cells, like all genuine batteries, release electricity as a consequence of chemical reactions. As predicted by the Arrhenius equation, these reactions become more powerful as temperatures increase.[6][7] Essentially, you are improving the conductivity of the battery by raising its temperature.

3.Place the battery back in the electronic device. You may only have a few moments of battery life, so make the most of them.

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Protéger son smartphone de la casse

Indispensables à notre quotidien, de plus en plus chers, nos smartphones nous sont précieux et les protéger de la casse devient un impératif. Loin d’être incassables et même programmés pour tomber en panne à plus ou moins longues échéances, votre téléphone est pourtant un indispensable de votre quotidien, il est donc nécessaire de faire le protéger au mieux.

Plusieurs solutions sont possibles pour éviter les dommages sur votre téléphone, suivez le guide !

Quel intérêt de protéger son téléphone ?
Avec des smartphones de plus en plus fins et des écrans de plus en plus grands, les smartphones récents dévoilent aussi plusieurs faiblesses en risquant d’être plus facilement endommagés en cas de choc. Protéger son téléphone, c’est faire en sorte qu’il dure le plus longtemps possible.

Outre le fait qu’on espère pouvoir s’en servir le plus longtemps possible, protéger son smartphone c’est aussi s’assurer de son bon fonctionnement à long terme.

Au moment où l’envie d’un nouveau smartphone se fera sentir, vous pourrez peut-être envisager de tirer profit de votre ancien téléphone en le revendant sur le marché d’occasion. Toutefois celui-ci doit être en bon état si vous espérez en tirer un bon prix et pouvoir ainsi diminuer le coût de votre nouvelle acquisition.

La priorité : l’écran
Quand on parle de protection pour smartphone on pense souvent coque ou autre cover en oubliant l’écran ! C’est pourtant lui le point le plus fragile et le plus exposé de votre téléphone ! Les vitres étant toujours plus grandes, la surface potentiellement exposée aux chocs en cas de chute l’est aussi !

Il est donc primordial d’opter pour une protection en verre trempé. Il en existe pour les différents modèles, capables de se fondre avec l’écran, elle protège l’écran sans en changer l’utilisation. Véritable absorbeur de choc, avec une protection en verre trempé, le tactile fonctionnera très bien et l’image ne sera pas altérée, mais votre écran, lui sera complètement protégé.

Attention à la pose : l’écran comme la protection doivent être parfaitement propres. Au moment de la pose, il faudra aussi chasser correctement les bulles d’air, au risque de ne pas pouvoir profiter pleinement de votre écran.

La coque pour une protection intégrale
Si les smartphones sont conçus pour résister aux petits chocs, en cas de gros chocs ils risquent, au mieux, quelques égratignures, et au pire, d’être cabossés ou éventrés. Même si vous l’avez choisi avec soin pour sa couleur, son design, avec une coque, vous êtes assurés de limiter les dégâts en cas de choc.

Il existe de très nombreux modèles parmi lesquels des modèles en silicone qui se moule sur votre téléphone, et même transparents pour que vous puissiez pleinement profiter de votre joli téléphone.

Pour les personnes particulièrement maladroites ou évoluant dans un contexte à risque, notamment les métiers en extérieur, sachez qu’il existe des coques tout terrain qui résistent à peu près à tout ! Renforcées, elles protègent vos téléphones avec des matériaux qui absorbent les chocs. Parfois plus lourdes, elles sont souvent moins élégantes mais au diable l’élégance quand il s’agit de faire durer son téléphone portable !

Les flip-covers pour conjuguer protection et aspects pratique.
Les couvertures intégrales offrent une protection plus rigide que la simple coque mais elles offrent la possibilité de stocker des cartes et autres tickets de transports ou paiement.

Grâce à la couverture, tout le téléphone est protégé, écran inclus. En contrepartie le téléphone est complètement caché par la couverture, mais rien n’empêche d’opter pour une jolie couverture qui correspond à vos goûts !

>>>>>>>>>>>>>Cell Phone Battery

How to Know when You Have to Get a Replacement Battery

Between browsing the internet, playing games, and using other apps, the battery on your phone or laptop takes a daily beating. Batteries have limited life spans and can wear down as they get older and are used more and more. It will become necessary to replace your battery, but it can be hard to tell exactly when you should make the change. This article will help you know when you have to get a replacement battery.

1.Check for excessive heat when the battery is in use. A little heat is normal when batteries are recharging or working, but excessive heat can be a sign that they are dying. Notice if the battery starts to heat up significantly more than normal, or compare your suspicious battery to a newer one to see if there is a significant difference in heat.

2.See if your battery gets bloated or swells up. Sometimes when the rechargeable batteries start depleting, the internal cell ruptures and starts leaking. A small bulge will be the first visible sign of this starting. To check if the battery is bloated, place it on flat surface. If it wobbles or does not lie down properly, that could mean it’s depleting.

Using bloated batteries is riskier as they might explode on being charged.

3.Notice any reduced battery performance. A fully charged phone battery should provide at least 20 hrs of battery life on standby mode and minimum 7 hrs on usage, while laptop batteries usually have a life of around 2.5 – 3 hrs on usage and several days of shelf life. If your battery lasts for a significantly shorter period of time, or if you’ve noticed a decrease in the battery life during the time that you’ve had your device, this could be a sign that the battery is wearing down.

4.Take note of any automatic or sudden losses of power. Sometimes when the unit’s capacity is deteriorated it still as fully charged, after only charging very little. When you use it, it shows the battery as depleting very fast. Sometimes, the battery may shut down, powering off the device, while you are using heavy applications or on a call for a long time. This generally appears with excessive heating of the battery.

If when you switch the phone back on, you find that the battery is not hot and there is still power left, then phone is faulty but your battery should be fine.

5.Look for visible corrosion or physical changes. See if the terminals and electric panels on the battery appear to be rusted. No matter how small the area is, show it to a specialist. Visible corrosion means that there is some internal problem and it is time to change the battery. Continuing with the corrosive battery may end up destroying the phone.

You must know where you can get a proper replacement battery. It is important to check that the specification of the replacement battery is same as the rechargeable battery and is compatible with the device.

All Cell Phone Battery in online store, such as Acer, Asus, Gateway, Apple, HP, Compaq, Sony, Fujitsu, Lenovo, Toshiba or MSI Cell Phone Battery and so on.

Dell Latitude 7400 2-in-1 review: A nearly perfect combination of power and battery life

If you’ve been wondering about whether a long-life Qualcomm Snapdragon PC is for you, Dell would like a word. Dell’s new 14-inch Latitude 7400 2-in-1 achieves a simply incredible 18 hours of battery life using a powerful Intel 8th-gen Whiskey Lake processor. It also offers a full complement of ports and a slightly gimmicky feature called ExpressSign-in (yes, it’s really spelled that way).

As our review shows, Dell has designed a stylish business notebook optimized for life on the road. It’s also optimized for IT rather than personal budgets, as our review unit clocked in at a whopping $2,800. But if you want a business laptop with all-day battery life and performance, the Dell Latitude 7400 2-in-1 delivers.

Dell Latitude 7400 2-in-1 basic specs
Other than a surprisingly subpar webcam, Dell’s Latitude 7400 2-in-1 is optimized for the road warrior: A compact form factor, 1080p display, and a massive battery mean you’ll be able to work for hours.

Display: 14-inch (1080p) touch
Processor: Intel 1.9GHz Core i7-8665U (Whiskey Lake)
Graphics: Intel UHD 620
Memory: 8GB-16GB LPDDR3 (16GB as tested)
Storage: 128GB-256GB NVMe PCIe SSD (256GB as tested)
Ports: Two USB 3.1 Gen 2 Type-C (Thunderbolt 3, Power Delivery/DisplayPort); Two USB 3.1 Gen 1 Type-A; HDMI 1.4; microSD; optional microSIM WWAN
Camera: 720p HD Camera (user-facing); Windows Hello capable
Battery: 52Wh, 78Wh (78Wh as tested)
Wireless: Qualcomm QCA61 802.11ac (2×2); Bluetooth
Operating system: Windows 10 Pro
Dimensions: 12.59 x 7.87 x 0.59 inches
Weight: 3.30 pounds, 4.08 pounds with charger (measured)
Color: Aluminum
Options: Fingerprint sensor inside power button; contact smartcard reader
Price: $2,802 ( as configured; starts at $2,379

A robust, yet chunky build
The Dell Latitude 7400 2-in-1 invades the long-battery-life territory defined by Lenovo and Qualcomm’s power-sipping Snapdragon through sheer brute force. Almost the entirety of our review unit was defined by its massive 78-watt-hour battery, more than twice the capacity of some competing laptops. That, and a power-sipping display, serves as the Intel ecosystem’s answer to what Qualcomm and its partners promise.

Dell touts the Latitude 7400 as the world’s most compact 14-inch commercial 2-in-1, and that’s probably accurate. What that means, however, is that the Latitude 7400 is decidedly chunky, with a few more millimeters of Z-height than a thin-and-light design. Dell uses this to its advantage, however, by including a full cadre of ports.

The Latitude 7400’s 3.3-pound heft, while not svelte, weighs less than expected. It’s also fair to say that the 78Wh battery option will allow you to leave the charger at home in most cases, which would otherwise bring the total travel weight to 4.08 pounds. 

Dell’s Latitude 7400 certainly doesn’t look like the stereotypical function-over-form business notebook. The silvery aluminum exterior offers a bit more style. More and more notebook vendors of this generation are trimming the bezels to streamline their products, and the 7400 is no exception: The side bezels are just 0.4mm thick, with a bit more space (0.6mm) allocated to the top bezel to accommodate the webcam. 

The Latitude 7400’s display also emphasizes battery life, with a conventional 1080p display that’s protected by Gorilla Glass 5. Not only does the Latitude’s display use extremely low power, the amount of light it emits is limited: Dell rates it at 300 nits, though ours emitted a maximum of 284 nits. While that’s not enough to combat outdoor glare in the summer sun, we plopped the Latitude 7400 next to a well-lit window and tapped away without issue. We didn’t measure its color accuracy, but after comparing it to several other displays, it matched up well with a Microsoft Surface Book 2.

All told, the combination of slim bezels and the compact 14-inch display mean that the chassis measures just 12.59 inches wide by 7.87 inches deep by up to 0.59 inches thick. We didn’t try it on an airplane tray table, but it should fit just fine. That additional thickness also lends Dell’s Latitude 7400 2-in-1 absolute stability, with no detectable flex whatsoever. 

Dell put equal care into the Latitude’s aural ergonomics, too. Dell ships its Power Manager utility inside the Latitude 7400, with options for the default Optimized setting, plus “Cool,” “Quiet,” and “Ultra Performance.” I found the default Optimized setting rarely turned on the system fan even while running benchmarks. Enabling Performance Mode increases the clock speed and runs the fan more frequently, yet fan noise was exceptionally quiet and unobtrusive to the point that I had to cock an ear to even detect it in the IDG offices. In the quiet of a home office the dearth of fan noise allowed me to hear a slight, intermittent staticky buzz that louder PCs would have drowned out. 

Dell’s ExpressSign-in: A convenient gimmick 
Dell touts the Latitude 7400 2-in-1 as “the only PC that senses your presence,” with a technology the company calls ExpressSign-in. If configured with Windows Hello, ExpressSign-in will lock your PC automatically when you walk away. But it will also detect you when you approach, then use Windows Hello to log you in.

The technology uses a sensor package to determine when there’s no one nearby, then automatically locks your PC. Windows already does something somewhat similar (if enabled via Windows settings): If you pair a phone via Bluetooth, Windows can lock you out automatically once your phone goes out of range. However, Bluetooth’s range can be long enough that Dynamic Lock doesn’t activate until you’re farther away.

ExpressSign-in isn’t that much better. It automatically turns off your PC within three minutes if it can’t detect anyone in range. (In testing, it took 1 minute, 3 seconds in an empty office.) If someone wanders by and triggers the sensors before then—poof! your PC is back on, unlocked. Manually locking your PC is more effective, though you can always forget.

ExpressSign-in’s complementary “wake on approach” technology is somewhat gimmicky: As you (or anyone else) nears, sensors detect your approach and ready Windows Hello for immediate login. (Otherwise, you’d have to tap the spacebar or power button, like a savage.) I love Windows Hello, but ExpressSign-in is the PC’s equivalent of waving your foot under an SUV’s bumper to raise the back hatch. Do you need it? Probably not, though it’s fun and convenient.

A solid typing experience
Like many people, my day-to-day work is performed upon a laptop keyboard, where I prefer comfortably spacious keys and medium key travel. While the Latitude 7400’s keys are a bit small for my taste, I found the laptop’s keys pleasingly springy.

Dell’s keyboard layout is pretty standard, using the conventional “cross” of arrow keys in the lower right-hand corner, with the Print Screen, Home, End, Insert and Delete keys left for the function keys in the upper row. Of note is a key to disable the mic—a personal concern of mine—with a small LED to alert you when that particular function is active. Each key is backlit, with a two-step gradation: on, brighter, and off.

The Latitude 7400’s precision touchpad is a bit small because of the compact chassis. Clickable throughout all but a fingerbreadth at the top of the trackpad, it proved both smooth and comfortable to use. I performed a number of two-, three-, and four-finger gestures easily.

As you can see in the spec list above, the Latitude 7400 2-in-1 ships with a generous selection of ports. Though our review unit didn’t include either, the Latitude 7400 can be configured with a fingerprint reader embedded in the power button, as well as a smartcard contact reader within the chassis. Instead, the webcam doubles as a Windows Hello biometric login, and includes infrared sensing. There’s no privacy shutter, however, though many competing notebooks now include this feature. 

If you buy the Latitude 7 400 2-in-1, consider investing in a dedicated webcam for your monitor. Images taken with the webcam (0.9MP still images, 720p video) were fuzzy, and areas of the image were overexposed, even with HDR capabilities turned on. I’d like to see a bit more attention paid to the webcam inside a notebook designed for business users. 

Consumer-quality speakers
Though Dell designed the Latitude 7400 2-in-1 for business users, its audio is comparable to, or better than, what you may find on a consumer laptop. That’s thanks to the MaxxAudioPro by Waves enhancement technology, which serves as both a graphic equalizer and a positional sound feature. 

Turning on the MaxxAudioPro equalizer, along with its MaxBass technology, boosts the low-end audio to a pleasing level that evens out the listening experience from lows to highs. Additional features like Width widen the stereo experience using just the laptop’s speakers. Though PCWorld hasn’t performed a side-by-side comparison to evaluate one audio-enhancement technology compared to another, some form of audio enhancement goes a long way to improve the typical laptop audio experience, and MaxxAudioPro offers one of the most sophisticated feature sets available.

With headphones in, MaxxAudioPro also provides the option to turn on the nx positional audio, which uses the Latitude 7400’s user-facing webcam to track your head’s position and route the sound accordingly. Turn your head to your left, and Waves routes more audio to your right headphone speaker, and vice versa. In all, the nx technology generates the illusion that the audio is coming directly from the screen—a nifty trick, though one you can live without. 

In all, I only found two things I didn’t like about Dell’s MaxxAudioPro experience. By default, the software asks you to specify what sort of headphones you plugged in: true headphones, earbuds, or over-the-ear earbuds. That gets old, though you can opt out. The Waves MaxxAudioPro nx technology also refuses to work with UWP apps, which excludes both the Microsoft Store Netflix app as well as any audio played back within Microsoft Edge. Though nx may be a bit of a gimmick, the restrictions are annoying.

Add-ons and accessories
Dell’s Latitude 7400 2-in-1 ships with the usual contingent of Windows bloatware, along with three Dell-branded utilities: Dell Command | Update, its utility for updating the BIOS and drivers; Dell Digital Delivery, a digital software storefront, and Dell Power Manager.

The latter utility is a fantastically well-thought-out app with provisions for managing the laptop’s power consumption, monitoring and controlling the charge status, and even maximizing the longevity of the battery. Another provision even allows your laptop to run on battery power during certain predefined periods to minimize the load on the power grid. The only thing I’d like to see is the number of charge cycles that the battery has been subjected to. Otherwise, Dell Power Manager stands out as an example of what an OEM app should be.

Dell’s PN579X active pen registers 4,096 levels of pressure sensitivity, with a 240Hz report rate. Though the Latitude 7400 2-in-1 doesn’t include a dedicated holster to stash the pen, both sides of the 7400 are magnetized to grip the pen when not in use. There’s also a lanyard in the box, as well as a SIM removal tool. 

While the PN579X does offer tilt support, it wasn’t functional on the Latitude 7400. It’s an odd pen, too: The top-mounted shortcut button serves as an app launcher, configurable within Windows, but there’s no erasure capability. The only way to “erase” e-ink is to slightly depress the top of the barrel-mounted button. Otherwise, though, the e-ink latency was minimal.

Dell’S WM527 is essentially a Microsoft arc mouse, though with a thumbwheel and without the ability to fold flat. A mouse that balances fore and aft rather than with a solid base sort of creeps me out, but it’s truly ambidextrous, with a side-mounted button on either side. You can connect either via Bluetooth or with an included wireless dongle. It runs on a pair of AA batteries.

Dell’s WD19TB Thunderbolt dock, meanwhile, demands a sizable portion of your desk for the expansion ports it offers. Weighing 1.29 pounds, the dock requires a footprint of 8.1 x 3.5 inches. Though the Latitude 7400 supplies a number of ports, the WD19TB provides many more: a pair of DisplayPort connectors, an HDMI connector, two USB-C 3.1 Gen 2 ports, 1 more generic USB-C port, and a Thunderbolt 3 (USB-C) connector, too. Unfortunately, you’ll need to figure out which is which, as they’re marked with somewhat cryptic glyphs (an “SS10,” a DisplayPort “D” and a lightning bolt) that don’t quite make clear what should be plugged into what. There are also three USB 3.1 Gen 1 Type – connectors, Gigabit ethernet, and a 3.5mm mic/headphone jack.

Top-notch performance and battery life
The Dell Latitude 7400 2-in-1 proves you don’t have to sacrifice performance for long battery life. While our review unit topped the heap in some tests, it finished no lower than the middle of the pack in others. It also delivered the best graphics performance we’ve seen outside of a dedicated GPU. The selling point, however, was the battery life, which exactly matched that of a Snapdragon 850-powered tablet, the Samsung Galaxy Book 2, while providing the performance of notebooks powered by Intel Core microprocessors. 

We test using a mix of synthetic and real-world benchmarks. The latter category loads apps like GIMP and OpenOffice to simulate real-world workloads. These latter tests are based on PCMark 8, which use a battery of different apps grouped into three benchmarks: PCMark 8 Work, Home and Creative.

While Work emphasizes office tasks such as video calls, spreadsheets, and word processing, the Home test begins steering the workloads toward web browsing and light gaming. The Creative workloads are typically the most processor-intensive, leaning harder on GPU-intensive tasks like gaming, as well as photo and video editing. For a business notebook, the Latitude 7400’s performance delivered stellar performance right out of the gate.

PCMark 10 reworks all three benchmarks for the modern era. Again, typical office tasks like video calls play a role, but heavy-duty image manipulation using the GIMP image-editing tool as well as more subtle metrics like app startup times and GPU-stressing physics tests also appear. PCMark 10 recently debuted, so our archive of benchmarks isn’t as comprehensive as it is for PCMark 8. In this modern benchmark the Latitude 7400 still does well.

We also stress the laptop processor in two ways: via Cinebench, a Maxon-developed benchmark “sprint” that asks every CPU core and thread to render a scene as quickly as possible, and HandBrake, an open-source tool used to convert a Hollywood movie into a format that can be played back on an Android tablet. First up is Handbrake, where the Latitude 7400 2-in-1 is nearly the fastest at completing this real-world task.

Cinebench stresses all of the cores over a short period, using either R15 (a simpler scene) or R20 (a more complex scene). We test with both, though we have a larger database of scores from the older test. We were a little surprised to see the Latitude 7400 finish midway down, given its performance elsewhere. We’ve just shown the R15 results here. One note: turning on the Ultra Performance mode within Power Manager didn’t make a difference in the PCMark or 3DMark tests, but it did here: performance jumped 8 percent, to 612.

Finally, we return to 3DMark to test the integrated GPU using the Sky Diver test. You’ll see many desktop GPUs use more advanced tests, but the laptops and tablets tend to deliver scores on the Sky Diver benchmark that are more indicative of the sort of performance you’ll receive on simpler, older games. While you could try playing some of the latest 3D games on a device like the Latitude 7400 2-in-1, the sheer complexity of the scenes they render would likely bring this laptop’s low-end MX150 GPU to its knees, unless the game’s resolution and image quality are dialed down to extremely low levels. Still, the Latitude 7400 outperforms everything that doesn’t use a dedicated GPU.

The piece de resistance, of course, is the Latitude 7400’s battery life. Because of its massive 78Wh battery, we didn’t have much doubt that it could deliver on its promises of all-day battery life. And boy, does it: With a battery life north of 18 hours, the Dell Latitude 7400 is a perfect choice for a transcontinental or transpacific flight, say from San Francisco to Taipei, or from London to Los Angeles. It just keeps chugging away, even with display brightness dialed up to our standardized levels. We loop a 4K movie over and over until the battery expires. It requires a weekend and more just for a satisfactory number of repetitions. 

We should note that within Dell’s power-management software lies an option to extend the battery life even more, through a process that lowers the display brightness, switches off the keyboard backlight, and clocks down the CPU. We couldn’t discern any effect here, in part because we dialed the display brightness back up to our standardized levels. But with an 18-hour “standard” battery life, who’s counting?

Conclusion: A must-have business laptop
Though more airlines are including power plugs, the real test of a laptop is running from appointment to appointment, without any promise of a laptop charger in sight. That’s been the case for buying a Qualcomm Snapdragon PC—more so than performance, which has suffered somewhat from how the processor interprets instructions. Qualcomm promises that its upcoming Snapdragon 8cx fixes those flaws.

We can wait. The Dell Inspiron 7400 2-in-1 delivers right here and right now. The marriage of top-notch performance and 18-plus hours of battery life merits our Editor’s Choice award. It’s a struggle to find a caveat: the weight? The 1080p display? The lack of an integrated GPU? Yes, you’ll pay through the nose for this ultrapremium business PC. But it’s the whole package, and worth fitting into your IT budget if you can. 

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LG Gram 2-in-1 review: A convertible laptop with plenty to like

Convertible laptops usually come with more compromises than the LG Gram 2-in-1 does.

Despite having a 14-inch screen, the LG Gram 2-in-1 (model 14T990) is lighter than most 13-inch notebooks. It spares you the thick display bezels and performance drawbacks that often apply to laptops with 360-degree rotating screens. It doesn’t even suffer from weak battery life or limited ports.

These qualities literally come at a high price, though, with the LG Gram 2-in-1 retailing for $1,500. While that’s reasonable for a laptop with an Intel Core i7 processor and 512GB of storage, you can’t configure cheaper models by cutting back on storage or CPU speeds.

There are a few design drawbacks. The keyboard runs shallow, and the speakers are some of the worst you’ll find on a high-end laptop. If you can look past those shortcomings, the LG Gram 2-in-1 provides a great combination of screen size, portability, and battery life that just may be worth the premium price.

This review is part of our ongoing roundup of the best laptops. Go to that story for information on comepeting products and how we tested. 

LG Gram 2-in-1: Price, specs, ports
As of now, LG offers only one version of the Gram 2-in-1, with an Intel Core i7-8565U processor, 16GB of DDR4 RAM, a 512GB solid state drive, and a 14-inch 1080p display. A fingerprint reader is embedded in the power button, and the webcam is a standard 720p resolution with no Windows Hello face recognition.

For inputs and outputs, the LG Gram 2-in-1 has two USB-A ports (one on each side). There’s also a single USB-C port, and it’s not Thunderbolt 3-compatible. Although you can use USB-C for charging, the Gram ships with a proprietary charger, which isn’t as nice as having a pair of USB-C ports and a universal charger. On the plus side, the Gram has a full-sized HDMI output, MicroSD card slot, and headphone jack. There’s also a USB-C-to-ethernet adapter in the box, though it supports only 10/100 Mbps speeds.

The Gram 2-in-1 even comes with a stylus—a hefty aluminum pen that uses Wacom’s AES 2.0 tech, which supports 4,096 pressure points and tilt shading. Flip the screen around into tablet mode, and you can draw or sketch ideas on the 14-inch screen. Unfortunately, the Gram doesn’t include any kind of dock or magnetization for the stylus, and applying moderate pressure to the screen creates a distortion effect around the pen, so serious artists will probably want to look elsewhere.

Design and display
LG didn’t reinvent the wheel with the Gram 2-in-1’s convertible design, with a screen that rotates 360 degrees into tablet mode. But unlike most other convertibles, the Gram manages to cram in the necessary hinge mechanisms without a comically large “chin” beneath the display. The borders around the display measure about an inch on the bottom, 0.4 inches on top, and 0.3 inches on either side, so the Gram is about as large as 13-inch laptops that don’t have such shrunken bezels.

The key to the Gram’s lightness is its magnesium and nano-carbon metal alloy enclosure, which, if we’re being honest, feels kind of like plastic. It’s certainly more rigid—there’s no noticeable flexing when you hold the Gram by its corners—but the center of the laptop does flex a bit under pressure, especially if you press along the back edge. The Gram might feel classier if it provided more color choices beyond drab gray with black keys, such as the sleek white-on-white option that LG offers for its non-convertible Grams.

As for the display, it’s a 1920×1080-resolution IPS panel with Gorilla Glass running from edge to edge. The viewing angles are excellent, with colors becoming just slightly dimmer and warmer when you tip the screen toward your head, but the display’s peak brightness of 303 nits is just average.

Keep in mind that on a 14-inch 1080p screen, you’ll notice individual pixels more than you would on a 13-inch screen with the same resolution. The extra breathing room is still nice to have, though, and a 1440p or 4K screen would likely bring serious trade-offs for both cost and battery life.

Keyboard, trackpad, and audio
Keyboard quality is one area where the LG Gram 2-in-1 suffers for its slim figure. While the key layout is spacious, the keys themselves feel mushy and don’t travel much. On a typing test, I averaged 101 words per minute, which is in line with my results for other laptops, but it’s not the most comfortable laptop for prolonged typing.

The bigger problem with the keyboard is the space bar. It’s smaller than normal even by 13-inch laptop standards, and is flanked by unusually large Alt keys on either side. Without fully pressing it, the space bar rocks back and forth when I press it gently around the corners. At one point while I was typing the right edge became stuck. Pressing firmly on the center snapped the space bar back into place. We queried LG, and the company said it had not heard of this problem on any other unit.

The LG Gram 2-in-1’s touchpad feels similarly skimpy, with a stiff clicking mechanism and a surface that doesn’t glide as smoothly as it could. It does use Microsoft’s Precision Touchpad drivers, though, so at least the cursor feels responsive, and you can use three- and four-finger gestures to switch apps, show the desktop, or cycle between desktops.

As with the keyboard and trackpad, LG also may have sacrificed sound quality in pursuit of a thin and light design. While laptops generally aren’t known for great speakers, the Gram 2-in-1 has one of the worst systems you’ll find on a high-end laptop, with tinny audio and practically no discernible bass. This could be a deal-breaker if you plan to use the laptop more for media consumption than productivity.

A 14-inch laptop doesn’t just give you more screen to work with. It also allows for extra space inside the laptop, which can lead to better thermal performance or a bigger battery. The LG Gram 2-in-1’s benchmarks bear this out, with scores that match or exceed those of many similar laptops—including both convertibles and conventional clamshells.

Battery life is the star of the show. The LG Gram 2-in-1 packs in a 72,765 Whr battery. That’s much larger than the batteries in any 13-inch laptop we’ve tested lately. The result is 709 minutes (11 hours, 49 minutes) of looping video playback at a brightness of 255 nits. HP’s Spectre x360 13 (2019) is still the champ, but no other ultrathin laptop comes close.

On PCMark 8’s Work 2.0 test, which cycles through a series of simulated productivity tasks, the Gram had an average score of 3,564, putting it ahead of several other laptops in its class and only lightly behind the Spectre x360 among 2-in-1s. In real-world use, the Gram’s cooling fan never had to kick into high gear while browsing the web, using the Tweeten Twitter client, and editing documents simultaneously. Lap use remained comfortable throughout.

The LG Gram’s HandBrake score shows how the CPU handles a longer task–in this case, encoding a movie for Android tablet playback. The 69-minute time is among the best in our comparison set. The Gram edged out some fellow 2-in-1s like the Spectre x360 13 and Lenovo ThinkPad L390 Yoga. Fan noise does become more noticeable under this kind of workload, but it’s not overly loud or whiny. Most of the heat concentrates around the center back of Gram’s underside, so you can still keep it propped on your legs with minimal discomfort.

The benefits of a larger laptop are less pronounced in Cinebench, which tests CPU performance in short bursts. Here, the LG Gram 2-in-1 fell into the middle of the pack, with a single-thread score of 158 and a multi-thread score of 533.

3D graphics are also a weak spot for the LG Gram 2-in-1, with 3DMark scores of 4,565 (overall), 4,280 (graphics), and 7,185 (physics). As with most other thin-and-lights, the Gram won’t be great for gaming anyway, and it’s clearly not a media consumption laptop given the Gram’s subpar audio quality.

Should you buy the LG Gram 2-in-1?
While the LG Gram 2-in-1’s keyboard, trackpad, and speakers are weak spots, this is overall an enjoyable laptop to use thanks to its spacious screen, long battery life, and light weight. It’s probably not a great fit for a desktop replacement, but it’s excellent as a travel companion. The included stylus is a nice touch for drawing, writing, and marking up documents, even if there’s no place to put it. If you’re okay with dropping $1,500 for all that, the LG Gram 2-in-1 could be the convertible for you.

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Samsung Galaxy Note 10 Video Teaser Hints at New Productivity Features, 20W Wireless Charging Tipped

Samsung Galaxy Note 10 video teaser has been released just days after its formal launch date was announced formally. The video teaser highlights the enterprise-centric features of the Galaxy Note 10. It also suggests that the next-generation Galaxy Note model would debut with an all-new DeX mode to transform any HDTV into a desktop computer. Alongside the teaser, the Samsung Galaxy Note 10 has been tipped to arrive with a 20W wireless charger. A US FCC listing earlier hinted at a 15W wireless charger that the South Korean giant was expected to launch for the new Galaxy Note model. It is also rumoured that in addition to supporting 20W fast charging via the new wireless charger, Samsung is set to bring 20W reverse charging capability through a new Wireless PowerShare feature.

Among other developments, the latest video teaser of the Samsung Galaxy Note 10 has been released by the Samsung Indonesia Twitter account. It doesn’t reveal any specifications of the new Galaxy Note. Nevertheless, it showcases all the major productivity features that we can expect in the upcoming phablet.

The video suggests the presence of the new DeX mode on the Galaxy Note 10. The mode would include some new advancements to bring an enhanced desktop-like experience through the new device. Further, it claims that the Galaxy Note 10 will replace a list of devices for professionals.

“Working with too many devices? Time to power up… Be ready to meet the next level power,” the company writes while concluding the 30-second video teaser.

It appears that Samsung would project the Galaxy Note 10 as an enterprise-focussed device. The handset is likely to come with also have an all-new S Pen stylus and a new camera setup to support creative users and professionals.

In addition to the video teaser, the Galaxy Note 10 wireless charger has been rumoured online. Tipster Roland Quandt has claimed that the company will unveil Wireless Charging Stand EP-N5200 as a successor to its existing EP-P5200 that was unveiled alongside the Galaxy S10 phones. The new model is said to support 20W wireless charging.

This is notably unlike the 15W wireless charger that was spotted on the US FCC last week. An image has also been leaked in response to Quandt’s tweet that suggests 20W reverse wireless charging support. This could be a part of the Galaxy Note 10 and come as an upgraded Wireless PowerShare feature. Moreover, the development is likely to be limited to Samsung wearables supporting the WPC 1.3 standard.

At MWC Shanghai 2019 last month, Samsung showcased its 45W fast charging solution that could be a part of the Galaxy Note 10. The new technology is likely to take on Oppo’s 50W Super VOOC fast charging solution.

To recall, the Samsung Galaxy Note 10 launch is set for August 7. The launch is taking place in New York City. Alongside the Galaxy Note 10, Samsung is rumoured to unveil the Galaxy Note 10+ that was initially claimed as the Galaxy Note 10 Pro.

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Qualcomm Asks US Appeals Court to Pause Antitrust Ruling’s Impact

Qualcomm on Monday asked a US appeals court to pause an antitrust ruling that could drastically alter its business model while it tries to overturn the ruling.

The filing with the 9th US Circuit Court of Appeals came after US District Judge Lucy Koh last week declined to put on hold her own ruling in a case brought by the US Federal Trade Commission against the San Diego company, which is the largest supplier of modem chips that connect smartphones to wireless data networks.

Koh ruled that Qualcomm had engaged in anticompetitive patent-licensing practices to keep a monopoly on the mobile chip market. Koh ordered Qualcomm to license its technology to rival chipmakers, which include firms like Taiwan’s MediaTek.

Qualcomm has been fighting to have the ruling put on hold while it pursues an appeal, which could take more than year.

The San Diego, California company has argued that letting the ruling stand could upend its talks with phone makers over chips for 5G, the next generation of wireless data networks.

“Qualcomm will be unable to revert back to its current license agreements, undo this web of new agreements, reverse any exhaustion of its patent rights, or recover all the revenue lost or transaction costs incurred” if it ultimately wins its appeal but the judgment remains in force during the process, the company wrote.

Qualcomm also challenged Koh’s ruling that Qualcomm’s patent fees are a “surcharge” on other chip suppliers, effectively raising their prices and making them less able to compete with Qualcomm. Qualcomm charges phone makers the patent fees whether or not they buy Qualcomm chips because the patents cover fundamental aspects of cellular technology that go beyond its own modems.

Koh ruled that phone makers likely take into account the total cost of the bundle of license fees plus the chips, which makes Qualcomm’s overall package less expensive than its rivals, violating competition laws. Qualcomm rejected that theory in its filing Monday.

“There is, moreover, no reason that (smartphone) OEMs would regard the royalties they pay Qualcomm as attributable to the prices the OEMs pay for rivals’ chips – any more than they are attributable to the price the OEMs pay for other components such as batteries or screens,” the company wrote in its filing.

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