My biggest battery drain is 4G. So, I use LTE ON OFF app. It allows me to switch to 3G.
Also: run phone with less brightness when possible.
Display off in 2 min
Try to stop or close all apps not needing.
Check running apps and close.
I love Razr SMARTACTIONS, especially theBattery saver for night. Go to Moto,or google smartactions to find or create choices that fit your use. I found that battery saver monitors or apps drained my battery,which is whymI,LUV Mototola /mart actions app pre.loaded on phone.
Good luck!