Lithium-Ion (Li-Ion). 4550 mAh 56 Wh. 11.4 V. Black. Number of batteries included: 1 pc(s). DELL Battery PRI 56WHR 3C LITH BYD. Features. Battery technology. Lithium-Ion (Li-Ion). Battery capacity. 4550 mAh. Number of battery cells. 3. Battery voltage. 11.4 V. Product colour. Black. Packaging data. Number of batteries included. 1 pc(s). leaflet. Origin Promo. Origin Eco