57Wh 45N1144 45N1145 57+ Laptop Battery for Lenovo ThinkPad L540 L440 T440P T540P W540 W541 45N1147 45N1148 45N1150 45N1160. For Lenovo ThinkPad T440P T540P L440 L540 W540 W541 Series. FRU P/N 45N1145, 45N1149, 45N1151, 45N1159, 45N1161.
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