I am having some problems with my mid 2010 MBP. Sometimes, when I am using my laptop, the battery indicator does not go down. It just stays at a percentage (for example, 90%), and just stays there. However, the battery does still drain. (Captain Obvious) Is this because my MBP is getting old? I don't think that is the reason (Think 2 year old laptops still should have some life kicking). If is this not true, can there be an another reason?