ASUNCELL 10.8V/4400mAh 68+ 45N1124 Laptop Battery for Lenovo ThinkPad T440 T440S X240 X240s S440 S540 X250 T450S L450 X260 K2450 T450 T460 L460 T550 W550S L470 P50S T460P T470P T560 X270 Series