This is a brand new Toshiba Satellite p855-s5102 battery. This Satellite p855-s5102 battery is rated 10.8 volts and 5200 mAh and will normally last 4 hours on a full charge.

This p855 s5102 battery is rated 10.8 volts and 5200 mAh and will normally last 4 hours on a full charge. Each battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 2 hours to 4 hours of run time with this Satellite p855-s5102 battery when new, depending on your energy use.