We don’t know if your 4′s life will really be doubled by the Exolife , but at least we know that the is slim, light, and will give your gadget a bit of a power boost.

1a89d10025asetop.jpg The Slim Exolife iPhone 4 Case Will Give Your Battery a Boost [IPhone]

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The Slim Exolife iPhone 4 Case Will Give Your Battery a Boost [IPhone]