Capacity: 5200mAh. Not Compatible ： Lenovo ThinkPad T42s T42si 42T4846 42T4847 42T4845 42T4844 45N136 45N137 45N138 45N139 45N164 45N165 42T483 42T482 T43s T43si. Compatible Models：( Ctrl + F for fast search ur laptop model).
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