The "fix" is the way you're interpreting it. It's not that the eyetem is using up 90% of your battery charge, it's that 90% of the usage of your nattery is the syste,. If you add all the "usges", you'll find that 100% is being "used". 100% of the battery charge being used is being used. That could mean that 1% of the charge is being used per hour, but the system would be using 0.9% per hour.