Originally Posted by Wisheezy
Not sure you know how it works? It has to add up to 100% so are you expecting every application on the phone to equally using up? so %20%20%20%20%20?
Also, I personally think 10% in 4 hours is pretty normal, considering the first 2/3% of the battery isn't actually 100% anyway (so when it's 100% it's basically 97/98%) and 4 hours of 10% means 40 hours would be 100% completely dead. I don't see an issue here..?
Not sure you understood the OP. They went from 100% battery to 10% battery in 4 hours. That would be a 90% battery drop.
Yes, all of the items in the battery usage list should add up to 100% (probably a typo somewhere in the OP, but that's irrelevant). If Android system was responsible for 90% of the battery drain and the battery has drained 90%, then the Android system has used 0.9 x 0.9 = 0.81 or 81% of the battery.
I'm an aerospace engineer. Don't challenge me on math.