|... if the adapter is kicking out the correct volts/amps|
... and the "amber/green" laptop led's are "on" I'd say its a "naff" battery, the older ones only lasted a couple of years!
... if you run it off the mains adapter and do'nt use the laptop as a mobile unit then just use it without the expense of a new battery! (...yep I do!)
... Posting is provided "AS IS" with no warranties