Powerful and small. Li-ion emergency battery with 6000 mAh capacity. Equipped with double USB port with 2.1A total output power and microUSB cable for battery or device recharging. It can be connected to all devices having 5V operation voltage and maximum 2.1A current input, can also be used to charge tablet, MP3 players, GPS, bluetooth headsets and speakers. Equipped with practice light and 4 indication led for residual power.