Smartphones are getting ever smarter and batteries ever better, but it seems that the poor things can just never catch up. It's a thankless, tireless job powering your gadgets, and sometimes those cells need a little help. That's where external batteries come in to lend a hand, giving your gadget those few precious extra hours of life -- enough for you to find your way home after that impromptu third encore sing-along that seemed like it would never end. The $40 Primo Battery Cube from PhoneSuit is one of the latest, a 1,000mAh reserve tank for your thirsty mobile. But is it worth making room in your pocket for? Read on to find out.
