Emaks 9-Cell 11.1V 100Wh 0C52864 Battery for Lenovo ThinkPad W540 T440P L440 T540P,P/N:45N1153 45N1147 45N1159 45N1149 45N1158 45N1151 Battery Type: Li-ion ll Cells: 9-cell ll Capacity: 100Wh ll Voltage: 11.1V Replace Part Number: 0C52864 Emaks guarantee: - Emaks have registered a U.S. Trademark and the serial number is 87249070;And We are USA based Company that Wants your Repeat Business so, if You Do Not Like our Product or Don't Want It For Any Reason, We Will Happily Accept The Return . ( 6 Month Replacement and Lifetime Support Guarantee) Compatible model:Lenovo ThinkPad T440P T540P W540 L440 L540 Series CONDITION:Emaks products are CE / FCC / RoHS certified, tested by the manufacturer to match and / or exceed the OEM specifications