Smartphones and tablets are being used more frequently in the battlefield, and that means that battery power is more important than ever. Soldiers often carry spare battery chargers in the 90-pound combat packs they carry into war zones, but the batteries are often lost or broken. BAE Systems wants to help lighten the…

The iPhone isn't ideal for watching videos for a long period, it drains battery and is uncomfortable. The iKit Nu Charge's built-in battery and kickstand fix that.

The Eton Mobius is more than an iPhone case. It's also a battery pack with an 1800mAh battery that can double your battery life, and a solar charger that gives you 20 minutes of talk time per sun hour. [Geeky Gadgets]

The Sprint Evo 4G does a lot of things brilliantly, but endurance is not one of them. Until this Mugen battery pack came along, granting Evo owners' wish of a full day's use on one charge.

Packing a battery pack, a GPS receiver, IPX-7 waterproofability into a single case to protect the otherwise svelte iPhone sounds like overkill, but if you're going to put a case on a phone, you should do it right.

There are more than a few iPhone/iPod battery packs floating around these days, but Kensington's gone and thrown one in with its new $70 charging dock.

As Matt explained last year, batteries are holding up laptops, cellphones and PMPs from lasting long enough and running fast enough to get things done properly on the go. What's my solution? Portable battery packs.

The SOLiCharger is solar-chargeable lithium ion pack for your iPhone that can fill to capacity in four hours of sunlight.

Richard|Solo has unveiled a backup battery for the iPhone that has some features its competitors don't—a built-in LED flashlight and a laser pointer. All gimmicks aside, the 1800mAh capacity is good—but I just don't see the value in buying one of these awkward extenders for $70 when you can pick up a more practical…

FastMac has unveiled their second generation iV battery pack for the iPhone 3G, and it promises to deliver up to 24 hours of talk time, 750 hours (31 days) of standby, 20+ hours of video and almost 72 hours of audio playback time. Depending on your settings, we are talking triple or even quadruple the available power…

PSP Fanboy just learned that Sony's discontinuing their 2200mAh PSP battery pack, an official aftermarket addon that would allow you to game for up to 12 hours or so. What's the deal? We're not sure, but someone from Sony said they're looking at other ways to "service the consumer," which might say to us that they're…

The Gadget: iV iPhone case and battery, which adds 4x as much battery time to the iPhone while not adding too much more bulk.

The Verdict: The rubberized plastic feels nice, the LED flash/flashlight on the back is good for finding your keys or taking low-light pictures and it clips neatly onto your belt if you're one…

Even with our extreme weekend Pokemon binges, the DS Lite usually doesn't have to be charged more than once every few days. Which means this DS Lite battery pack isn't for us. But for those of you who go on long car trips or plane rides, this could mean the difference between catching them all or being bored to tears.

We don't know if it's the motion sensing or the Nunchuk two-for-one peripheral design, but the Wiimote's battery life is pretty miserable. The default Xbox 360 wireless controller's batteries lasted at least twice as long as the Wii's, forcing me to change batteries twice while going through Zelda. Now with…