You're supposed to "condition" the battery once a month by running it down until the computer turns off (which is NOT the same as running the battery down to zero...not a good condition for these batteries and I doubt the computer lets you do that anyway), then letting it sit there like that for a few hours. I forget the details but google "macbook battery conditioning" and I'm sure you'll find it quickly.
tanx for the replies, guys
btw wat does the 'coconutbattery' (im not sure if that name's correct) do, is that useful?