S7 edge battery drain issue

I have my s7 edge 1 year now and the battery was great but now is so bad,i leave it overnight and it drains 40% from 3AM to 11..I tried everything: wipe cache,fac reset,those things on forums and everything.Android OS 14%,Device idle 11%,Android System 8%,Cell standby 3% and other apps are not bad..Im thinking of Battery change because i already broke the back of the phone and have no water resistancy,if i change the battery will it be worthed ?

I'll bet if you go to "Settings" > "Application Manager" > "All" > "Google Play Services", then "Force Stop", and "Disable" it, your battery drain will slow down dramatically.;);)