Get up to 5 hours of battery life and improved laptop perfomance with an extended life Dell RD855 laptop battery. This long run RD855 battery will run at least 50% longer than your original battery. The added run time is achieved with an additional 3 cells inside the cartridge. This battery is the same size as the smaller capacity battery but provides an additional 2 hours of battery life.

This Dell RD855 battery is compatible with the Dell Inspiron E1505, 1505, 1501, 6400, Latitude 131L, and Vostro 1000 series of laptops. Additional compatible laptop models and battery part numbers are listed below. Don't see yours? Check out our Dell battery catalog for the complete list, or call our customer support for help.

Estimated run time with this battery is 3-5 hours. Longer run times can be achieved by minimizing the power use, especially the screen brightness. We use the highest quality lithium-ion battery cells that charge faster and last longer than cheaper, lower quality batteries. Each battery is individually tested before shipment and backed by a 30 day complete satisfaction guarantee and a 2 Year warranty.

Not all computer batteries have the same capacity and run times. The higher capacity battery cells inside this cartridge have an energy capacity of 7800 mAh. These are the highest capacity Li-ion batteries on the market today and superior to batteries rated at 6600 & 7200 mAh. This RD855 battery will deliver 20% more run time than cheaper 9 cell versions and 77% more run time than cheaper 6 cell versions of this battery. If you prefer the 6 cell battery, click here for the standard 6 cell battery Dell laptop (our Dell-65)..