Hi, something strange happened recently: I have an MBP late 2008, and I purchased a new battery for it in July 2013. Pretty suddenly this autumn, the Battery health went down to 25% and the Apple shop said: too bad, not much we can do. But, after a week or so, Battery health has gone up to 91%! And I can run the Mac longer on the battery, so it doesn't look like false numbers. Anyone knows how this could happen? Could it be that the health monitor got wrong data when it sadi 25%? I have done a couple of "cycles" since, but can that help this much? Or is the battery so unstable that anything can happen now (keeping my fingers crossed....)? (I have used both Coconut battery and Battery health, and they both shoiw the same.) Thanks for any insight!