Dell :: M1530 Owners With 9-cell Batteries

So I haven't even had my laptop for a year yet (will be a year at the end of May). I bought a separate 9-cell somewhere in late June or early July.

I've noticed as of late, that my battery life is nowhere near as long as it used to be. With all my tweaks and once it was sitting at the desktop idle, Rightmark would regularly say I have almost 6 hours of charge left. As of today, I don't even see 4.5 hours, sometimes barely 4 hours.

I checked the battery by holding down the button at back; the lights go away instantly and then 3 of them light back up.

I definitely didn't buy this thing with the expectation that it would lose over 30% of its capacity in barely 10 months of use, especially considering a new battery costs between 100-150 bucks.