This is a brand new Dell TN1K5 battery. This TN1K5 battery replaces the original battery found in Dell Precision Mobile M4600, M4700, M4800, M6600, M6700 and M6800 WorkStation series laptops. If you're looking to get even longer battery run time, check out our Dell Precision M6400 9 cell battery.

We use the highest quality lithium-ion battery cells and components that charge faster, last longer and weigh less than cheaper, lower quality batteries. Lower quality batteries can wear out in just a few months. Our batteries can last up to 5 years.

Each TN1K5 battery is individually tested before shipment and backed by 30 day complete satisfaction guarantee and a 2 Year warranty.

You can expect about 2 - 3 hours of run time with this Precision TN1K5 battery when new, depending on your energy use.