Battery of Samsung Galaxy S5 drained in 5 hours on Android 5.0 I received the over the air android 5.0 update a week ago for my Samsung Galaxy S5. I installed the update and since that the my fully charged battery is depleted in 5 to 8 hours. Before the battery was depleted in 24 to 36 hours. 

I have a spare battery with the same behaviour. 

Below screenshots of the battery usage. Note the second battery:
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.