This is a brand new Toshiba Qosmio premium grade replacement battery. The superior South Korean cells inside the battery cartridge will provide longer run times between charges as well as a longer service life than cheaper batteries.

This PA3589U-1BRS battery is typically superior to the original battery and is 100% compatible with your Toshiba Qosmio. Each PA3589U 1BRS 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 2-1/2 hours of run time with this PA3589U-1BRS battery when new, depending on your energy use.