45N1144 45N1145 45N1152 45N1153 45N1150 45N1151 0C52864 0C52863. For Lenovo ThinkPadT440P T540P. For Lenovo ThinkPad W540 W541 L440 L540 Series. Step 3: Disconnect the cable connected to the battery and then take out the battery.
eBay