Thin emergency battery lithium polymer with 2 USB ports. Lightweight aluminum structure that facilitates the dispersion of heat. Supplied charged and ready to use. Fast recharging universal. The special chip recognizes the charging protocol of the connected device and provides optimal energy for a fast charge and protected. Short circuit protection, overheating, overload. Capacity 4000 mAh - Output: 2400 mA (TOT). - Micro USB cable from 30 cm included.