Additionally, the optional MB-D14 Multi Power Battery Pack extends the grip for comfort and can effectively double the battery capacity when using two batteries.
ENGADGET: Nikon unveils lightweight, full-frame D600 DSLR -- hands-on and low-light samples (video)
BusinessWeek questioned the battery life of the new phone, which will pull double duty as a battery-slurping iPod.
The new juice pack air allows iPhone 5 users to do more with their device on one charge, packing 1700 mAh to double the battery life of the device with the simple flip of a switch.
ENGADGET: Mophie Juice Pack Air brings an extra 1,700 mAh to iPhone 5 for $100
"This new juice pack will provide an enhanced user experience to HTC One owners and introduce them to the benefits of having double the battery power available to them on-demand, " said Ross Howe , vice president of marketing.
ENGADGET: Mophie Juice Pack for the HTC One now available Mobile
Customers using HTC's newest flagship smartphone with a mophie juice pack can rock, talk, surf, and send for twice as long with the simple flip of a switch, receiving the benefits of double the battery life on one charge.
ENGADGET: Mophie Juice Pack for the HTC One now available Mobile
The Kindle power case is interesting too, not only does the it promise to double your Amazonian slab's battery life, but it also relocates the device's power button to the front.
ENGADGET: Nyko Kindle Fire power case, Vita speaker stand hands-on
If 10% of the world's automotive production switches to plug-in, we'll need to at least double the world's current lithium battery output.
The service-orientated slate (as opposed to a gadget, which CEO Jeff Bezos claims nobody wants) comes with a bigger battery, a new processor and 1GB RAM -- double that of the 2011 model.
Apple says they've figured out how to implement third party multitasking without hurting performance or battery life, and they're demoing it now -- you just double click the home button and see a list of your apps, and you can just tap to switch between apps.
ENGADGET: Multitasking comes to iPhone OS 4.0 -- but not to the iPhone 3G
The Durabook came up just short of four hours of battery life through normal usage, which doesn't compare to the Toughbook's double-digit numbers, but is more than adequate for everyday use.
ENGADGET: Durable faceoff and torture test: Panasonic's Toughbook 30 vs. GammaTech's Durabook D15RP
Designed to give you surprisingly big sound in a portable package, the Logitech UE Mobile Boombox includes a rechargeable battery that delivers up to 10 hours of music, depending on use, settings and conditions, and can even double as a speakerphone for voice or video calls.
ENGADGET: Logitech unveils new Ultimate Ears range, includes $99 mobile boombox (video)
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