WiFi only, or connected to cell network? This is a very important detail, since if its on the cell network, the reception in your area can have a HUGE
effect on battery drain. In fact, when talking about smartphones, I'd say cell reception is the primary
factor behind battery life.
In any case, the battery drain you mention (30-40% drain with 1 hour screen on time) is not awful, although not great either. Especially depending on what you are doing during that screen on time (gaming can be a huge drain, streaming video too, but usually less so). I get maybe 5 hours screen on time if I'm watching Netflix. That with no battery saving, WiFi only Note 8.
Also, make sure Smart Stay is turned off, as it seemed to me to be a big battery drain (and never really worked all that well for me, anyway).
---------- Post added at 12:58 PM ---------- Previous post was at 12:51 PM ----------
Originally Posted by bradipovsky
- If you misuse Greenify or any other "battery saving" apps they can actually lead to battery drain
: If "When charging , you must power off until 100%" means that every time you charge you must do it until 100% then it's false. .
Agree with both these points. I've seen these "battery saver" types of apps (Juice Defender in particular) which have caused more issues than they solve. Some folks will swear by them. But don't take for granted they will increase your battery, and use them wisely. Don't "misuse" them as you say.
And charging while the phone is powered off is a myth that has been debunked long ago. Aside from the fact that the device will charge slightly faster (it won't be draining as its charging) this will have no effect on battery life.
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Phone: HTC One X (AT&T version) Rooted, Bootloader Unlocked, S-Off
Tablet: Samsung Galaxy Note 8 (WiFi only) Rooted