Lenovo Part
04X3738
is compatible in the following Models:
Lenovo ThinkPad W Series laptops
ThinkPad W520 - 4270CTO
ThinkPad W520 - 428226M
ThinkPad W520 - 42822CM
ThinkPad W520 - 428234M
ThinkPad W520 - 4282CTO
ThinkPad W520 - 4282RF2
ThinkPad W520 - 4282RH5
ThinkPad W520 - 428426M
ThinkPad W520 - 42844EM
ThinkPad W520 - 4284BP1
ThinkPad W520 - 4284E69
ThinkPad W520 - 4284F65