S6 Edge Plus battery drain after marshmallow update

A day after upgrading to marshmallow, the battery life on the S6 Edge plus has been diminished greatly.  I have not added any new apps or activated any new features.  I have tried clearing the cached data as instructed in other threads, but I have not seen any improvement.  This is an issue as I switch to this phone for the battery life, and up until the update, was impressed to be able to only charge the phone once a day.  How can this be adjusted?

Re: S6 Edge Plus battery drain after marshmallow update
Customer Service Rep

We are sad to hear you are having these issues, TG29640. Have you tried the device in Safe Mode. This will disable 3rd party apps to test if one is cause the problem. 
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