I noticed yesterday that my battery ran out of juice faster than normal. I charged it overnight last nigh, as I do every night.
When I woke up the battery was only 85% charged. Does this mean I need a new battery? I have had the phone since October 2008? DO batteries only last 8 months?
By charging it overnight every night while I am sleeping amI hurting the battery?
It is possible that it's dying. That would be earlier than I would expect, but it happens. If it were me, I would go ahead and order another one. It never hurts to have a spare battery.
Have you recently installed any new applications (to include updates of current ones) or a new OS? If so, that could be related to the trouble.