Winten 8000 mAh WT-P80A-GR Portable Battery Pack, External Battery Pack, High Capacity Power Bank Charger, Dual USB output (5V/ 2Ah & 1Ah) - Green 8000mAh (at the internal battery cell voltage: 3,7V) Lithium battery, 2 USB output, 5V/ 2 Ah and 5V/ 1 Ah, with the battery charge/capacity level LED indicator High security through over voltage protection, overload protection and short circuit protection Long service life and sustaining capacity through rechargeable Lithium battery