Until some genius invents that all elusive never die battery, we have to make do with such gems as this, Jackery Leaf, which is one of the best of its kind. For users of iPhone 5 and 5S, you can make the most of extended talk and app time with this lightweight and powerful case which ensures fast charging on the move. Not only will it double your juice, its dual-purpose high-speed connector also enables data transfer. Clicks on and off with ease.

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