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Have you ever forgot your phone`s charging cable at home? I have, and I hate it too much, since those are usually the days when your phone will be dead in like 2h.
Sony presented an updated solution for that problem: new external batteries. They`ll have a capacity going from 3.500 to 7.00 mAH, only 12,9 mm, and they take around 1.5h to charge most smartphones sold today.
The batteries can be recharged around 500 times and they`ll cost around 23.