V7's high-quality replacement notebook batteries are made from the highest-quality cells available & incorporate all of the standard logic boards, thermal protectors, thermistors & circuit breakers to ensure maximum levels of safety, reliability & efficiency. V7's wide selection is compatible with top-line products from all major manufacturers & meets or exceeds original OEM specifications to provide longer-lasting quality & no memory effect. Features Technology: Lithium-Ion Cells: 9 Cell Capacity: 7200m Ah Compatible with: Dell Latitude D531, D820, D830 Series, Precision M65 Series