Ok my battery was doing great and giving me 2.5 hours on a charge for months. Now all of a sudden it won't even charge past an hour and 40 minutes. Is that normal for my battery health to be that low this soon? I have a 2.2 ghz SR mbp with 2gb ram running Tiger OS X. Purchased it in July 07. Does apple have any warranty or defect guarantees against the battery? I checked Coconut battery and it said my mbp's batter is only at 80% now. That's horrible.