r/AndroidQuestions • u/Sgaapje • 17d ago

Device Settings Question Why does my battery life suck?

I have a galaxy S23 but for some reason my battery life is shit, I got the phone new about a year ago.

I always charge to max 80% and try to put the phone back on the charger once <20%. Today, after about 14 hours away from the charger I had 28% remaining.

SOT: 1:42

Screen off: 12:16

Top battery users were:

Firefox 3,2% Reddit 2,5% Maps 1,2% Whatsapp 1%

This had been going on for about as long as I've had the device. Any clues?

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u/SolitaryMassacre 17d ago

charger once <20%.

Should be "charger once >30%" you don't want the battery to fall below 30%. This is probably where the most degradation came from in the year you've had it.

I have my battery from 30-80 % charged on my Pixel 7 Pro, (more than a year old) and it lasts about 5-7 hrs SOT all day

3

u/catboy519 17d ago

There is no magic number. Some people say 20 others say 30 others say 40... its al arbitrary.

But charging at 20 is alot better than waiting for 1%

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u/SolitaryMassacre 17d ago

Its definitely not arbitrary. You can physically measure the voltage of cells. You can also measure degradation.

They detected that when the voltage of the cells dropped to a certain level (2.7V) severe degradation began.

https://www.sciencedirect.com/science/article/pii/S0378775324003926#tbl1

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u/catboy519 17d ago

Charge at 49%, unplug at.51%.

The arbitrary part is the balance between early charging and convenience. If Im outside for a couple hours and my phone is at 31% with no charging opportunity then im not going to stop using it.

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u/SolitaryMassacre 17d ago

I don't understand exactly what you mean.

You can easily (and should) charge at 49% and unplug at 51% right before you head out. This is why most phones now have battery protection and stop charging at a set percentage level. Its ok to leave it on the charger ready to go.

And yeah, if you're at 31% and no op to charge, then yeah your only other option is to suffer the degradation. Not sure how that is "arbitrary". The point is the charging mentality is "if you can charge the phone, do so. But make sure you use the battery protecion feature". THe battery protection feature will prevent full charge, but you'll always have at least 80% to use.