Lithium-Ion (Li-Ion). 5180 mAh 56 Wh. 10.8 V. Brand compatibility: Dell. Black. Number of batteries included: 1 pc(s). 6 CELL 65WHR DELL LATITUDE E6440 E6540 industrial rechargeable battery. Features. Brand compatibility. Dell. Product colour. Black. Battery voltage. 10.8 V. Number of battery cells. 6. Battery capacity. 5180 mAh. Battery technology. Lithium-Ion (Li-Ion). Packaging data. Quantity per pack. 1 pc(s). Number of batteries included. 1 pc(s). leaflet. Origin Promo. Origin Eco