This is a brand new Dell 99NF2 battery for the Dell Inspiron 17 7000 series of laptops. It is compatible with the Dell Inspiron 17 7000 series, including the 17-7779 and 17-7778 models. It also replaces the Dell original battery part number 99NF2.

This Inspiron 99NF2 battery is rated 56 Wh and 3500 mAh and will typically last 2-3 hours on a full charge. You can get longer battery life by dimming the screen and closing unused programs and dimming your screen brightness.

This Dell 99NF2 battery is tested before shipment and backed by 30 day complete satisfaction guarantee and a 1 Year warranty.

You can expect about 4-5 hours of run time with this Dell 99NF2 battery when new, depending on your energy use.