0C52863,0C52864,45N1144,45N1145,45N1146,45N1147,45N1148,45N1149,45N1158,45N1159,45N1151,45N1153,45N1769. Lenovo ThinkPad W541 Series. Lenovo ThinkPad W540 Series. For Lenovo IBM. Lenovo ThinkPad L440 Series.
eBay