At some stage this year I am probably looking to upgrade my S20 and for only one reason the battery life is very average, its not awful but having had an iPhone 11 Pro for a little while the s20 struggles to make it till bed time. I would rather be phoneless than go back to iphone so it leaves me with samsung. Out of the s21 + and ultra which one should offer better battery life? And would it give me all day? My iPhone 11 pro would get me 8-9 hours soc with loads of standy. My s20 gets me 5-6 soc with some standby. I know the ultra has a bigger battery but the plus has less to power, not sure if that would make a difference? I do prefer smaller phones but willing to have a large one in exchange for better battery.
First tip, always keep dark mode on if thats fine with you, secondly, go to settings, then go to connections, go to more connection settings and turn off nearby device scanning because it uses a lot of battery in the background, and the third tip is to uninstall any apps that you don't use because the less apps there are, the less battery that will be wasted in the background. Before I changed all these settings on my s20 plus, the battery would last about 6.5 hours but now I have changed the settings, the battery gives me about 9 to 10 hours before it dies which is a huge improvement. Please use these tips and you will have a much longer lasting phone and battery. Hope this helps!