This IBM ThinkPad X40 battery is compatible with the X40 X41 series laptops.

Note: If you have the ThinkPad X40 or X41 tablet this battery will not work.

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 IBM X40 battery is 100% compatible with your IBM ThinkPad laptop.

THIS BATTERY WILL NOT WORK WITH X40 AND X41 TABLET PC’s. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 1 – 2 hours of run time with this ThinkPad X40 battery when new, depending on your energy use. If you are looking for even longer battery run times, check out our extended run battery for your IBM laptop (our IBM-54XT). The higher capacity battery cells inside this cartridge have an energy capacity of 4000 mAh.

This battery replaces the IBM ThinkPad X40 X41 series laptops.