Battery of Samsung Galaxy S5 drained in 5 hours on Android 5.0
High battery usage of Google Play Services could be caused by a number of things. A few suggestions I could make to help rectify your issue would be to:

1) Force stop the app; clear the cache and then allow it to restart.
2) Install 'Greenify' from the PlayStore and prevent the app creating wakelocks.
3) If you are rooted; try reflashing an Android L 5.0 Gapps package with recovery.