Tenergy 6000mAh Mirror Finish Dual Port Power Bank/External Battery Can charge 2 devices at once (2 X USB output port) Up-to 3 Months super long stand-by time Instant power for your smartphones, tablets and mobile gadgets. Reliable Grade-A Lithium Polymer battery with over charging or over discharging protection Perfect for parties, road trips, long flights or whenever you need to charge your mobile devices