This Dell Alienware 2F8K3 battery replaces the original te Alienware M17X 5th generation (R5) and M18X 3rd generation (R3) laptop batteries. The M17x laptop has a 17" screen and the M18x has an 18" screen measured diagonally.
Note: If you have a removable cartridge battery, this is not the correct battery. Earlier versions of this laptop use a different battery. (R1, R2 etc.). Go to our Alienware laptop battery page for the full list.
This replacement 2F8K3 battery is an internal battery which requires the case to be opened up in order to charge the battery. In order to ensure that you receive the correct battery you should take your battery out and compare it to the picture above.
We use the highest quality lithium-ion battery cells that charge faster, last longer and weigh less than cheaper, lower quality batteries. Each 2F8K3 battery is backed by a 2-year warranty and 30-day money back guarantee.