Mini round power bank for emergency chargepower built-in Lithium-ion battery packOver current over charge over discharge over heating and short circuit protectionSupplied with USB cable and micro connectorsSpecification:Battery type:18650 lithium ion batteryCapacity:2000mAh 2200mah,Website:://.cbtgdesign.com, 2600mahInput:DC 5V/ 1AOutput:DC 5V/ 1AMaterial:Metal ABSCharge time:2-3hours  Battery Life