Aluminum alloy case (laser engraved) 2600 mAh Underwriters Laboratories Listed lithium ion Power Bank Charger recharges your cell and mobile phone battery when it’s running low. It recharges using a micro USB input cable, and it charges cell phone through its USB output port using phone’s own charging cable. Guaranteed up to 500 charges. Output is 5 Volts/1 Amp; instructions included.