As of this past couple weeks, I've noticed that my Note 10+ battery is draining slightly faster than usual. I have made sure to put all the apps I use to Sleep when not using them. Typical apps I mainly use are Samsung Internet browser, Google Play Books, YouTube, and Instgram. I've cleared the Cache and I always optimize the phone when possible via the Device Care widget. I thought the One UI 2.1 update would fix but its remained the same. I do use the 45W Super Fast Charger, can that damage the battery? I only charge it when my phone notifies me that I'm on 15%...it hasn't even been a year, the battery shouldn't be starting to show signs of going out already...
Search Samsung service place ask Replace battery.
Remember do not leave your phone all night with your charger plug in.
Maintain percentage 40% to 80% if you could or unplug as soon as reach 100% or little less.