My one (1) year old A54 was charged to 80%, and taken of the charger when I went to bed.
I picked up the phone when I woke up at about 7am today and charge was about 70%. I used a little duolingo and YouTube, total just over 1 hours. Now it is 11.30, and my battery is at 23%.
How can my, 1 year old phone just last only a quarter of the day of use?
Checking the battery usage, Contacts Storage, a basic background process/app, took >10% of my battery charge. I don't even know if this is the main culprit.
Not the first time I had raised battery drain issues. Threes after getting my A54, the drain was crazy even when left idle. Hence I had switched off, disabled, uninstall nearly all the Samsung automation, and at least I could get through to the evening. Note it is only till evening, not night!
I resigned that my battery drain issues might be causes by network issues and the A Series will never be as good as the S Series. However reading around, the S series also suffers from unexplained battery drain.
I'm envious of my wife's realme XT (4.5 years old) can still function from morning till bed time on a charge. Sigh. It will be three more years before my planned phone change. If by then Samsung does little to nothing to restore my confidence, I'll not entertain any future Samsung devices.
Did you put I this situation? For your first step charging?
Yes, fast charging. Not sure how this will help my quick discharge rate
This is the basic thing in our smartphone. There is how we can manage ; the tips and you must be every single day check it in the basic Device and Care 
Scan and saving your apps protection. While in case you always use some apps for the long time in the day, your battery life doesn't drain to much, It is my advice 😀 
