Mine does not get hot unless I am playing games, then the back gets warm. If I stop playing a few seconds its normal again.
Battery life is fine too but this can vary greatly depending on what apps you having running.
I would do a battery pull and quit disabling apps and let the OS do what it should. I don't have power saving on, no auto brightness mine is even a little high and I get 1-1.5 days easy unless I sit and play games or keep the screen lit for hours doing things.