Lithium-Ion (Li-Ion). 3450 mAh 53 Wh. 15.4 V. Brand compatibility: Toshiba. Black. Number of batteries included: 1 pc(s). BTI replacement 4 cell battery for Dynabook Tecra A40-J A50-J Portege X40-K series. Features. Brand compatibility. Toshiba. Product colour. Black. Battery voltage. 15.4 V. Number of battery cells. 4. Battery capacity. 3450 mAh. Battery technology. Lithium-Ion (Li-Ion). Packaging data. Number of batteries included. 1 pc(s). leafletOrigin Promo