Charging

[johnz237]

This is an interesting thing I've discovered: I have a 45W Samsung 2.0 (third-party, so take with a grain of salt) plug and the charger that came with my phone. I have another that came with my galaxy book 4 edge and a third-party one. Interestingly, I got different, repeating results for each cable. All show the exact same charge time and Fast Charge 2.0—images provided.

Perfectly happy with the amazing charge time, so this isn't the topic. I'm more intrigued by the results showing the same charge speed regardless of the wattage.

[Joeeye]

Not specifically. It's voltage that's important. Whilst it's true that excessive heat will cause degradation, the voltage is the important factor. Lithium ion batteries require specific levels of heat in order to charge effectively and safely.

All these factors aren't much of an issue really as all that is controlled by the chip inside the phones and chargers anyway, so charging, when functioning normally, will adjust voltage/amps to safely charge your device at the relevant speeds, this includes the heat levels as well.

[moe192]

You already charged it 22 times *****.. did you get your device on 1st Feb or afterwards? I only charged it 5 times and normally it lasts me 2 days

[johnz237]

Feb 1st. I had AOD display until a few days ago. QHD- Max hz

[moe192]

Oh okay same as me then 1st Feb aswell and I only charged it 5 times how did you charge it 22times that fast am assuming your a heavy user that uses the phone nonstop then?

[johnz237]

I use it to assist with my uni degree so- yeahhh quite a bit

[arianwen27]

Yeah thats what I'm talking about. The charge chip in the phone seems to only request 9v from third party compatible chargers. Meaning the amperage is increased and the heat is increased. The heat is increased to a point the device slows down it's peak charge rate to cool down. On official chargers, higher voltage are requested, meaning less amps are requested, meaning lower overall temperatures, meaning higher sustained charge rates.

Yes lithium ion batteries like some heat. But using the lower voltage causes too much heat faster than if a higher voltage is used

[Joeeye]

I charge from 0% to 100%. It's not ideal but a minor issue long term if you're a regular user. I've done this for several devices, like my S21 Ultra for over 4 years. It only becomes a problem if the device is left in these states for extended periods. As for battery health, it's still 100% on my S21 Ultra and has a very good battery life, even after 4 years.

I've had my S25 Ultra since 1st February and I'm up to 17 cycle count, so about a full charge a day. I'm quite a heavy user, so I think it's doing very well.

[moe192]

S21 ultra up until s23 and s24 you can't see the battery health if its 100% or below or whicher only option for that would be either by sending device for return or doorstep repair and they can check and tell you the health of the battery but only the new s25 series have the battery health

[moe192]

And I had my s25ultra since 1st Feb aswell and my charge cycle is on 5 only

[Joeeye]

It means you use your device less or for less intensive tasks than either myself or @johnz237.