Which samsung phone has the best battery life?

If you haven't had the battery replaced then you haven't tried everything

I would also suggest a factory reset. It helps clear the junk and then you can be more selective on what to install and what to keep running in the background full time. Disabling real time updates on everything except emails improved battery life on my phone - I really don't need news, social media, etc on a real time basis. Disabling 5G also helped because the phone isn't then searching constantly for a 5G signal which is pretty bad in my neighbourhood.

samsung.com/uk/…ng/

Basically, you're looking at the Ultra and Plus models if you want a flagship. A54 and a few others if you're happy to settle for mid range.

I have the s23 ultra and it's a fantastic battery life. I usually don't go below 60% and I am awake from around 6am and go to bed around 10pm. That's with a fair bit of usage too.

There’s a few things you’ll need to look at, in order to get a better sense of whether it’s your usage, the phone or the battery itself. 

Firstly, take a look at the battery and charging section inside the settings app on your phone. This should help identify any rogue apps which are causing phantom drain. If you don’t need them, delete them. 

Secondly, check how much battery your screen uses. Do you have the phone at max brightness all the time, for example? Do you have it at the highest refresh rate and resolution?

Thirdly, if you’ve had the phone from new, it’s probably time to change the battery. If you’ve had the S21 for more than 2 years (it was released more than 3 years ago now) then it’s almost certainly had 600+ battery cycles. 

The S21 never had great battery life on release. Most battery test sites had it at around 6 hours’ screen on time. So if you’ve had the phone a while, your usage is still the same as when it was new and the battery has degraded by 20% you’re probably only going to see 4.5hrs screen on time from it in 2024. 

If you want a newer phone with much better battery try the S23 or the A54 both from Samsung which should yield over 9 hours’ screen on time with sensible settings. 

S24 ultra, best ive had yet. Battery on 50%end of the day yesterday compared to %20 of my s23 ultra same usage

Well battery health declines with age so any new samsung phone will have good battery life, also cold weather effects battery (edited)

Age and usage determine the life. So what works for me may not work for you - I don't play games or stream videos, so getting 24 hours isn't too difficult.

My S23 Ultra's battery is pretty poor. I have been using it a fair bit, but I charged it to 100% at 8pm last night, and it was down to 67% by 11pm. It is almost a year old now, but my p30 Pro had better. Maybe I need to tinkle with the settings though.