Dentsing 57++ (9 Cell) 0C52864 Battery for Lenovo IBM Thinkpad T440p T540p W540 L440 L540 Series Model: 57++ Color:Black Voltage:10.8V Capacity:100WH Compatible P/N:0c52864 57++,ASM P/N 45N1152 45N1153 45N1144, 45N1148,45N1150,45N1158,45N1160;FRU P/N 45N1145, 45N1149, 45N1151, 45N1159, 45N1161 Compatible with: Lenovo ThinkPad T440p, T540p, W540, W541, L560, L540 Series 6 Months Warranty. If you have any issue, please contact us, we will help you resolve it before you leave a negative feedback or low review.Thanks for your kind support and patience.