I have had this problem just recently. I am not sure if it was due to the update. But some days Google Services is at 55-58%. Today it is at 26%. I am not sure if its due to using certain apps, or when I go in the hills hiking, so the phone works more to connect. Under "Location Settings" I have Access location checked, but location reporting and location history -Off.
I had a problem for a few days, then it was ok, the yesterday it was back. It seems to use alot of power when the phone is off and screen dark. Thank you.