Original 3500mAh 42Wh 3 Cell Dell WDX0R Battery
[AUBD-Dell-WDX0R-11.4V-42Wh-1]

I am very happy with the replacement battery I got from auadapterspc.com. It came when they said it would, was well wrapped for protection, slotted straight into my machine and worked immediately. Their website was also easy to use.