So I unplugged my phone from the charger this morning and took it to work. After regular use during my day at the end of my shift, 10 hours later, my battery is at about 70%. When I check the battery status and click on battery details, the Display only shows that it's taken about 6% of my battery. I have my display set to auto-brightness. To me, 6% is nothing, and it is so annoying when the auto-brightness dims the back-light. Tomorrow I am going to disable my auto-brightness and use the maximum brightness and see if that really makes much of a difference. If it only takes a small percentage again, I'm just going to stick with that. What is your brightness setting, and how much percentage does it take from your battery? Is it a very small number, like in the single digits?