I went from iOS to Samsung after 8 years and nearly died when my note 20 ultra battery was draining fast. as others have said, I'm a month into ownership and have 40% battery at 3am from a full days usage. some days it's far lower than this or even empty but right now the optimisation has made a significant difference. I must add I did rock 2 5g simcards too I've dropped that to 1 which made a big difference.
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