Specifications: This D820 Battery 87 WH replacement for Dell laptops features a 7800 mAh capacity and 87 WH power. It is designed with high-efficiency cells to ensure long-lasting performance, offering a complete power solution for your Dell Latitude and Precision series laptops. Compatible Laptop Models: Universal compatibility with Dell Latitude Series: D531, D531N, D820, D830; Dell Precision Series: M4300, M65, M65 Mobile.