Returned my S8 to get an S8+

I don't get it! I have the S8+ running qhd+ and my SOT is 1 hour 25 mins and my phones been off battery for 8 hours and I have 55% left. This does not make sense. im barely on the phone. how are these SOT's real? someone help me achieve this.I even turned off google now.
 

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