Chosen Solution
I have a slightly defective battery. The battery thinks that its capacity is higher than it is, and my system completely shuts off when the reported capacity hits 28%. This actually isn’t a huge problem– I’m pretty diligent about watching it and getting plugged in before I hit 28%. BUT it would sure be great to get a low battery warning when I hit 38%. (The ideal solution would actually be to reprogram the battery to think its capacity is accurate, but I don’t think that’s feasible without accessing its internal electronics.)
Sure you can. There’s a couple of different routes you can take: Check out this MacOSXHints forum post on how to set up an Applescript that gets triggered at a certain battery percentage. There are also 3rd party battery warning applications available, such as SlimBatteryMonitor, that lets you set the low battery warning level to whatever percentage you want.
