The Otterbox Defender with iON Intelligence is a rugged smartphone case with a built-in battery.
Initially available for the iPhone 4 and iPhone 4S, the case claims to double the battery life of the device. It has a 1450mAh battery built-in, bigger than both the iPhone 4 (1420mAh) and the iPhone 4S (1432mAh).
The case has strip of LED lights at the bottom which indicate how much battery power is left. The case will only ever start topping up your phone battery when it dips below a certain percentage. Unlike other battery cases, there's no need to switch it on.
The case itself will be part of Otterbox's Defender range. It has a triple-layer of protection consisting of a built-in screen protector, a polycarbonate shell and a silicon-skinned outer layer with port and plug covers that provide dirt and dust protection but not water resistance.
Otterbox's Defender range of cases add significant bulk to any smartphone but they are widely considered one of the best protective smartphone cases on the market.
The case has been designed to work with Otterbox's new iON Intelligence app, which is a free download in Apple's App Store and the Google Play Store.
The battery usage app estimates and predicts battery power and battery time remaining by monitoring device usage habits.
The Defender Series with iON Intelligence case will initially be available for the iPhone 4 and the iPhone 4S when it launches in the coming months.
It is expected to eventually be available for the iPhone 5 and the Samsung Galaxy S III, with more devices likely to be supported at a later date.
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