There's a few things...firstly there might be damage internally with battery. Adjust screen brightness to blue filter if not available try to on daylight saving. Disable background apps and close tabs. Lastly of a night put the phone on bedtime mode, you can still use the phone it sets the whole device to greyscale as the richness from colour hues and saturation in photos and running apps absolutely chews through phone batteries. Hopefully this helps If not so another last tip is look the question on app call Quoria (basically a new very of Ask Jeeves) or look up on YouTube Good luck.