Get longer battery life with a new Lenovo ThinkPad T400 replacement battery. This battery is compatible with the Lenovo ThinkPad T60, T61, R60, R61, T400 and R400 widescreen 14" laptops. Additional compatible laptop models and part numbers are listed below.

This battery IS NOT COMPATIBLE with the ThinkPad T400s or T410s models. Here you can find the ThinkPad T400s battery.

We use the highest quality lithium-ion battery cells that charge faster and last longer. 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. Lower quality batteries can wear out in as little as 6 months. Our batteries can last up to 5 years and are backed by a 2 year warranty.

Each ThinkPad T400 laptop battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 1 Year warranty.

You can expect up to 6 hours of run time with this ThinkPad T400 battery when new, depending on your energy use. If you are looking for even longer battery run times, check out our IBM ThinkPad T400 long run battery.