As my colleague recently pointed out, decent battery retention in a mobile device is perhaps at more of a premium than ever before. We love all the new and exciting features arriving with each and every updated revision, but keeping the thing running for more than a few hours at a time can be something of an uphill battle. The Infinity Cell kinetic charger is an iPhone battery pack with a twist, as it uses your body’s natural movements to generate the power, meaning you don’t need to be repeatedly hooking your handset to the mains in order to keep it juiced up.

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