AMABRO68, I for one know how it feels to experience battery drain after an OS update. Let's take a look together to see what we can do to get this improved. What make and model phone do you have? Which OS update was installed? Where all your applications up to date when installing the software update?
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i'm betting in settings/battery/usage you're seeing the highest % with google play services.
i did the reset in settings/note5 & will wait to ad apps to see if it was an app problem or the update.