For Lenovo ThinkPad T440 T440S T450S T450 T460 T550 T460P T470P T560. For Lenovo ThinkPad X240 X240s X250 X260 X270. For Lenovo ThinkPad S440 S540. For Lenovo ThinkPad K2450 L460 L470 W550S P50S. If run the battery shut down often, it will shorten the battery life.