Alienware m17x r3 - battery problems

Hey everyone,

So I bought a used alienware a couple of months ago, was and is working fine, except for one problem. A couple of weeks back I came home and turned it on, but after the first Klipsch loader a message comes in the BIOS format before the windows loader:

WARNING: The battery cannot be identified.
THe will be unable to charge this battery.

Strike the F1 key to continue, F2 to run the setup utility

I dont know how it happened or how it came up, I remember a full accidental drain of the battery before the problem, but I also fully charged it afterwards, this i just mentioned coz of the static charge issues in alienwares, I have tried many and all solutions available on the internet but none proved fruitful, I dont know what to do next, any suggestion would be greatly appreciated.