Charging problem

[sa1fraja]

Hi everyone, I've recently discovered that my s21 Ultra hasn't been charging at the usual rate it says it is. Usually it takes a little over an hour to fully charge from 0% but now it takes around 2 to 2 and a half hours. I downloaded the antutu benchmark app to monitor the charging input and found that thr charging input happens to fluctuate. Is there any way to resolve this issue?

[johnz237]

Seems to not be charging at the 25w it can.

The cable and plug are both Samsung and 25W chargers? Have you attempted other chargers?

Go to samsung members- support- diagnostics. See if it passes

[sa1fraja]

I've got two 25w chargers, I've tried using both of them, and get the same result.

[johnz237]

What about the diagnostics? And cables?

[sa1fraja]

I'll check diagnostics now, both cables and charging bricks are also from Samsung

[sa1fraja]

Just found this. Does it affect the charging speeds?

[johnz237]

Absolutely that does. The battery needs replacing via samsung repairs centre

[arianwen27]

Let me explain what happened. A battery shouldn't be drained to 0%. A battery shouldn't be kept at 100%. It seems like you have been charging it from 0% to 100% in one go. That's probably the worst thing you can do to a battery. Your phone is also a few years old now. Assuming you have done this a lot, you have degraded the battery so it cannot hold a charge correctly anymore. That error is saying your battery needs replacing as it has degraded.

Battery health tips: charge before 20%, stop at 80%, or use the health management settings to safely use 100%. Don't do a single giant charge with fast charging on. If possible, use a routine to disable fast charging overnight and let it slow charge as you sleep.

[sa1fraja]

Thank you so much. I'll try to get the battery replaced and use your tips