U20000 XTPower® MP-cell rechargeable external battery 20800mAh backup - 2 USB outputs 2.1A / 1A, 10 of adapter - charger for iPhone, iPad, iPod, Smartphone, Android phones, tablet PC, PSP, GoPro, ... (Devices electronic)
Just amazing, super long takes, the only problem is that it is long enough to fully charge, not to go at the last minute ....