I've found that with most of my phones a full depletion or two of the battery is needed for it reach its peak performance. Use it until it shuts down, & then charge it. I use the power saving mode. Your screen will adjust automatically depending on light conditions. I've had my Note2 for a week & the battery is great! Had GS3 & iPhone 4 before that. Hope this helps!
Mr. Big
Ive never done that with this phone but ill give it a try.