It's the thinnest external battery for the iPhone, doubles as a hard-shell protective case, and can give you almost double the time to talk, rock, surf, and send.

Ultra light, ultra thin and ultra convenient, the Juice Pack Air from Mophie, is also rechargeable - with pass-through USB charging and iTunes sync - and has an On/Off switch so you can decide whether it's time for it to be a battery or just stay a fully protective case.

It doesn't get released until tomorrow, and I've got one to give away.

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