I have a problem with my imac keyboard (2 battery) when i put new batteries it says that they have only 18% life next day there are 2 possibilities 1. one second is 15% next second it's 100% or 2. it's only 15 % or low. The idea is that i get a notification that i have low battery all the time and it won't let me write until i click ok and that makes it impossible to write... Any ideas?Anyone experiencing the same thing?