Leo's Pick to boost the battery life of the iPhone 4S

Mophie says this is the best of seven generations of their famous Juice Pack line. The juice pack air for iPhone 4 combines a rechargeable external battery power concealed inside a protective form-fitting case. Even though it's a hard-shell case your iPhone 4 will still have a low profile look. Mophie expects the juice pack air for iPhone 4 to double the available power. That means a full charged case gives users up to an additional 6 hours on 3G, up to 12 hours on 2G of Talk Time; up to an additional 36 hours of audio playback and up to an additional 9 hours of video playback. It contains a lithium polymer battery that packs an incredible amount of juice in a small form factor, namely 1500 mAh. But wait, there’s more. It features built in overcharge, short circuit and temperature protection. And there’s still more! The case design acts as a virtual speaker box, redirecting sound from the bottom of the iPhone 4 to the front. I heard a little demo and it did sound richer in the Mophie Juice Pack. An integrated LED status indicator tells you how much “juice” is left and also displays how much time remains during the charging process. The design includes a new, soft touch, rubberized finish and silver band that mirrors the iPhone itself. Cost is about $80.

http://www.mophie.com/mophie-juice-pack-air-iPhone-4-battery-case-p/1145_jpaxp4.htm 

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