This is a brand new Asus C21N1613 battery pack for the Chromebook C302C flip series.
This Asus Chromebook C302C Flip Battery is rated 7.7 volts and 4900 mAh and is 100% compatible with your Asus Chromebook Flip laptop. Each Asus Chromebook C302c Flip battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.
You can expect about 5 hours of battery life with this Asus Chromebook C302c Flip battery when new, depending on your energy use.