This is a brand new Asus C21N1509 battery. This Asus battery uses the best Lithium-ion rechargeable battery cells. The superior battery cells will provide longer run times between charges as well as a longer service life than cheaper batteries.
This C21N1509 battery is 100% compatible with your Asus VivoBook and each battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.
You can expect about 4 - 5 hours of run time with this Asus C21N1509 battery pack when new, depending on your energy use.
