Carlotta 8800mAh External Battery Charger Power Bank Powerful and rechargeable 8800 mAh lithium ion battery, enough to charge most smartphones 1-2 times Faster recharge with input and output of 2.1A. Egg design.Compatible with iPad, iPhone, Nexus, Samsung, Motorola, Nokia, HTC and LG Multiple protection system for added safety. It's designed to avoid overcharging and short circuiting for optimum reliability.