This little battery backup will keep your mobile devices charged up. The 2,200 mAh Jolt Power Bank contains a Li-Ion Grade A battery.. The 5V/1A USB output means that it charges at the same rate of most wall chargers. Includes a USB to Micro USB connecting cable which can recharge the battery backup or be used to charge up devices with a Micro USB input like Android Smartphones from Samsung®, Motorola®, HTC®, Nokia®, and others. Our batteries have undergone evaluation for numerous quality standards.