This is a brand new Dell type W7NKD battery for select Dell Inspiron 17 7000 series of laptops. This W7NKD battery 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 numbers W7NKD, PVHT1 and 33YDH.

This Inspiron W7NKD series 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 W7NKD battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 1 Year warranty.

You can expect about 2 - 3 hours of run time with this Dell W7NKD battery when new, depending on your energy use.