This is a brand new Lenovo 45N1140 battery for the ThinkPad S440 and V4400u models. This Lenovo 45N1140 battery features the highest quality lithium-ion cells and components.

This 45N1140 battery is rated 14.8 volts and 3100 mAh and will normally last 6 hours on a full charge. You can get longer battery life by dimming the screen and closing unused programs and applications.

This ThinkPad 45N1140 battery is 100% compatible with the original battery specifications and is individually tested and backed by a 2 Year warranty.

You can expect about 2 - 6 hours of run time with this Lenovo ThinkPad 45N1140 battery when new, depending on your energy use.