... protection High conversion efficienc big capacity portable power bank 5000mAh universal Portable Power Bank1, Quality,innovative and portable2, Charge state ... Polymer Lithium-Ion battery: 3.7V 5000mAhProtect Function: from short circuit, over-current, over-charging, and over-dischargingCharging Time - USB ... every battery inside. iIt is also ROSH manufactured. universal power bank,portable power bank