This is the 4th generation Xtend brand ThinkPad X1 Carbon battery and fits laptops made in 2016. There are 5 different laptops in the Lenovo X1 family. If you have a laptop older than this, this is not the correct battery. This internal battery is used on all laptops that begin with Type 20FB 20FC or 20FQ 20 FR as the initial portion of the model type number found on the bottom of the laptop.

This is the Xtend brand version of this battery. If you are looking for the Genuine OEM verision go to our Genuine ThinkPad X1 Carbon 4th gen battery.

We use the highest quality lithium-ion batteries that charge fast, last longer and weigh less than cheaper, lower quality batteries. This ThinkPad X1 Carbon GEN 4 battery is 100% compatible with the original battery specifications and is individually tested and backed by a 2 Year warranty.

You can expect about 4 hours to 8+ hours of run time with this Xtend brand ThinkPad X1 Carbon 4th gen battery when new, depending on your energy use.