Having just purchased a new Macbook to replace my dead iBook, I'm wondering if it's okay to wait a couple of days to calibrate the battery, given that the new process takes so long with the amounts of time you have to let it rest, let it sleep, leave it plugged in, etc. I need to take it with me to use it tomorrow at 8:30 a.m. and I don't think that whole process will be done by then unfortunately. I have it charging right now, and it says it's at 99% but it's been saying that for a while, still with the amber light. It was supposed to have 6 minutes left to full charge an hour ago. So after it goes green I have to let it charge for 2 hours, then unplug it and let it run down completely until it goes to sleep (probably at least 6 hours, right?) then let it sleep for 5 hours, then plug it back in and charge it fully. That's a lot of time and I'm just not sure I have it between now and tomorrow. Will it harm my battery if I wait a couple of days, say until Thursday or Friday, to calibrate the battery? I'll need to use the battery power between that time, and while I don't want to harm it, I do need to use it also...not sure what to do.