This is a brand new TOSHIBA premium grade replacement battery. If your battery is 11.1 volts or 10.8 volts, this battery will NOT work. Click here for the 11.1 Volt 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. In addition, Li-ion batteries are not subject to the memory effect common with older battery technology. This means you can recharge your laptop any time without diminishing your battery capacity. This laptop battery replacement is typically superior to the original battery and is 100% compatible with your TOSHIBA notebook computer. The 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 PA3591U-1BRS battery when new, depending on your energy use. This battery replaces the for TOSHIBA Satellite L40 L45 L401 L402 Equium L40 14.8V.