Toshiba Satellite Pro M300 4400mAh/48Wh 6 Cell Li-ion 10.8V Black Compatible Battery Toshiba Satellite Pro M300 4400mAh/48Wh 6 Cell Li-ion 10.8V Black Compatible Battery Compatible for Toshiba Satellite Pro M300 Each battery was tested at an original laptop by the manufacturer. High Capacity Replacement battery with 1 year warranty. mwave is the only authorized reseller of mwave batteries. Expedited Shipping Available. Buy with Confidence