Get longer battery life and improved laptop performance with a new AlienWare W075J battery. The W075J battery replaces the M17X R4 model. The AlienWare M17X model comes in two different shapes. In order to ensure that you receive the correct battery you should take your battery out and compare it to the picture above. It should also match with the part number W075J or another one listed below.
This Dell / Alienware W075J battery features the highest quality lithium-ion battery cells and components that charge faster and last longer than cheaper, lower quality batteries.
Li-ion batteries are not subject to the memory effect common with older battery technology. This W075J battery replacement is 100% compatible with the original battery specifications and is individually tested and backed by a 1 year warranty.