BULL-TECH SL410 Laptop Battery for Lenovo ThinkPad E40 E50 L410 L420 L510 L520 L412 SL510 T410 T510 T520 W510 ; ThinkPad Edge 14 15 E420 E425 E520 E525 ; fits P/N 42T4791 FRU 42T4751 55+ Battery type:Li-ion ; Voltage:10.8V ; Capacity: 48WH; Color:Black Replacement for:42T4235 42T4708 42T4714 42T4731 42T4733 42T4737 42T4737 42T4753 42T4756 42T4757 42T4757 42T4763 Fit Machine Models:ThinkPad Edge 14" 05787UJ 05787VJ 05787WJ 05787XJ 05787YJ 0578F7U 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Warranty: 18 Months Warranty,30 days money return guarantee!