I've actually tried everything, including turning off all bells and whistles on the phone, as well turning off WiFi, 5G, using power saving mode all day, no automatic brightness, low brightness, disabling all background apps, putting hundreds of apps into deep sleep or killed off entirely, no offline finding, no Bluetooth scanning or WiFi scanning, no auto rotation, cleared cache partition, factory reset, no AOD, yada yada yada yada...
...and yet Samsung has routinely ignored thousands of posts and more, here and elsewhere online demonstrating the A54 to have absolutely awful battery life.
The only answer that can be given is:
Samsung is paying shills and using bots in communities across the web to push lies about the A54.
And/Or
The processor (Exynos 1380) has such awful consistency between batches that their efficiency varies wildly. As do the cheap batteries they use.
If you can find my other posts, do look.
I had a 4.5 year old phone that connected to 2-3 Bluetooth devices all the time and listed to Spotify for many hours a day and with a basic LCD unable to utilise an efficient dark mode, (and no 5G), that phone still lasted all day, easily! Sometimes two. Hisilicon Kirin 710 better than a Exynos 1380. What an embarrassment for Samsung.
On the A54, from 85% to 10% I get about 16-20 hours and that's with 5G off and battery saver on, 95% of all apps in deep sleep and a couple Bluetooth devices, WiFi off, etc. On a proper full charge I'll get 1 day. This is with good mobile signals too when out and with mobile data off indoors and a good indoor WiFi signal.
The A54 lineup is just a big lie. It's an otherwise good phone, albeit a little slow and with a completely useless filler macro camera, but the battery issue let's it down so much. The a55 shamefully has the same processor.
People claiming 12 hours SoT with juice left in the tank on this phone (old online posts) are lying, or are indoors on WiFi with brightness on low.
The versatility of this phone is the worst I've had in years. The reliance on charging cables and battery power banks is sad but made more painful due to the 25w charging. I don't mind slower charge rates but I'm having to charge 2x a day. One after work and one before I go to work because even with power saving on and WiFi only (and much of the above), I'm losing 10-15% overnight.
Had Samsung a long while back, liked them initially, went elsewhere, came back to this and it's much the same with disappointment in regards to their longevity. Samsung hasn't learned that people want efficiency.
Edit: Oh and don't listen to that old chestnut "oooh it's learning your patterns"... pwahaha, so you're telling me that after almost 1 year my phone still has terrible battery because it is supposed to within 7 days (now up to 14 apparently, (lol people making excuses for Samsung) it is supposed to be learning my usage? What nonsense. And the same goes for this woman experiencing the naff battery of the A54. Waiting 7, 14, 30, 1000 days, won't change a ***** thing.
This phone is so reliant on software trickery to make it reach even half a day it is alarming.
ONE UI 6 sucks. The Exynos 1380 sucks and is massively inefficient and the updates that were promised was a salespoint... "X number of years of updates for the A54" - yeah and all we get is ***** and no fixes.
