BTYAVG1 New 14.8V 96Wh Laptop Notebook Battery Compatible with Dell Alienware M18x R1 R2 Series

Battery is a perfect replacement for Alienware M18x R1 battery. Make sure you cycle battery 100% to 10% three times. If you don't the laptop won't know how much battery is left so the system tray will only show "battery charging" or "battery draining". Wish it was an actual Alienware battery but it seems they don't make them anymore.

Ty