anything in "about this mac" -> more info -> power ?
Try restarting, might just be a graphical glitch. My battery icon goes red when it gets to a very low amount of charge. Maybe yours went low, you've charged it but the icon has filled up red? Just a guess but I'd say it's worth a restart.![]()
Pressing Option while clicking on the battery icon on an MBP brings up the battery status in the menu (should be “normal”) – clicking it brings up a help screen explaining the various states.
(from the comments in the excellent post http://theappleblog.com/2010/01/29/...tm_campaign=Feed:+TheAppleBlog+(TheAppleBlog))