This is a new Lenovo 45N1121 battery for the Lenovo ThinkPad T431s that features the highest quality lithium-ion cells and components.

This Lenovo 45N1121 battery is compatible with the Lenovo ThinkPad T431s models.

This Lenovo 45N1121 battery is 100% compatible with the original battery specifications and is individually tested and backed by a 2 Year warranty.

This Lenovo 45N1121 battery is rated 11.1 volts and 47 Whr and will normally last 5-7 hours on a full charge.

You can expect about 6 hours of run time with this Lenovo 45N1121 battery when new, depending on your energy use.