Description: External Lithium-Ion Battery Pack for laptops or similar devices. Cell: Lithium-ion cell(Imported from LG, Korea) Battery Capacity: 11Wh Battery Output Voltage: DC16/19V Battery Output Current: 4.5A Charge Time: 5.5 hours(6 hours maximum charge) Cycle Life: more than 500 times Charge Temperature: 0°C~40°C Discharge Temperature: -20°C~60°C(Recomend -10°C~50°C) Storage Temperature: -10°C~40°C(Recomend -5°C~35°C) Battey Size: 200mmX112mmX22mm Battery Weight: 750g Battery Gauge: 5 level LED indicator Battery Protection: over-charge/over-discharge/excess current/short circuit