Battery type: Li-ion; Capacity: 60Wh/5200mAh; Cells: 6-cell; Voltage: 11.1V. The battery is durable and has overcurrent protection, anti-overcharge, anti-overdischarge and temperature control functions. 100% NEW from manufacturer; Up to 500 recharge cycles over the life of the battery. 24 x 7 email support; 12-month hassle-free warranty.