This is a new Dell 312-0393 battery for the Latitude D531 D820 D830 D840 and the Precision M65 series. This 312-0393 battery uses the highest quality lithium-ion battery cells and components. This 312-0393 battery replacement is 100% compatible with your Dell Latitude notebook computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 2 hours to 2-1/2 hours of run time with this Dell 312-0393 battery when new, depending on your energy use. If you are looking for even longer battery run times, check out our Dell-50XT. The higher capacity battery cells inside this cartridge have an energy capacity of 5200 mAh. This battery will be compatible with batteries rated at 4400 & 4800 mAh capacities while providing up to 20% more run time.