This is a brand new Asus C12PJCH Battery for Zenpad 3S 10 Z500m series models.
This Asus C12PJCH battery is rated 3.8 volts and 22 Whr and will normally last 5-8 hours on a full charge.
Each battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 1 Year warranty.
You can expect about 5 - 8 hours of run time with this Asus C12PJCH battery when new, depending on your energy use.