This is a brand new IBM ThinkPad premium grade replacement battery. 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.

This ThinkPad T43 battery replaces the IBM Thinkpad T40 T41 T42 T43 R50 R51 R52 R50e R50p series laptop batteries and additional machines which are listed at the extreme bottom of this web page.

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 laptop battery replacement is typically superior to the original battery and is 100% compatible with your IBM ThinkPad notebook computer. The battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 2 hours to 2-1/2 hours of run time with this ThinkPad T43 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-51XT). The higher capacity battery cells inside this cartridge have an energy capacity of 5200 mAh. This battery will be compatible with batteries rated at 4400 & 4800 mAh capacities while providing up to 20% more run time.