Amsahr Replacement Battery for Lenovo SL410, E40, E50, 0578-47B, 05787UJ, 05787VJ, 05787WJ, 05787XJ ( 6 Cell, 4400 mAh ) 18 Months Manufacturer Warranty, 100% Satisfaction Guaranteed. 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargeable with No Memory Effect and Power Surge Protection. 4400 mAh, 10.8 Volts & 6 Cell Protective Retail Packaging, Each Product is Sealed with Anti-Static Shield Sleeve. Exclusive Offering of High Performance, Long Lasting, and Durable Grade A Cell Battery