I'm dead broke. So, I have a cheap battery for my dead-broke-esque 2008 MacBook. It only lasts about 2 hours on a full charge. However, it's a little goofy at times. Not in a dangerous way, just that it seems to miscalculate how much time it has left sometimes, and suddenly dies at 25%. I know, terrible choice to get an old battery. But I'm poor and was sick of outlet-surfing, so I got a cheap battery. Anyway, since my upgrade to OS X Lion (in 2018, mind you), I haven't had as much of a problem, but still might have it sometimes. Plus, I'm going to be letting a friend/colleague of mine use it for a while, and would rather tell him to "plug it in when it gets red" than sit and explain the goofy battery more than I already have.
So what I am wondering is how I can, if possible, change the percentage of battery remaining that will cause the battery icon to turn red in the Menu Bar. I also would think it nice to be able to spring the "Reserve power" notification at a certain percentage as well. I know I can also just AppleScript Finder to pop up and say "ey, you're low on power" but I think it would be better to change the actual alerts.