Battery damage due to too powerful S10plus power supply?

I have been charging my Samsung Galaxy S10 very often lately with the 65W power adapter for my laptop. (USB-C)

The power supply can adjust its performance. Likes it. Mobile phone does not get warm or shows errors.

It loads in 1.5 hours via the 65W NT.

But it only loads very slowly via normal power supplies. So 6-8h for 70% …

It is actually rather good for the battery, since it does not support a quick charge and therefore charges more slowly

With such high-performance power supplies that use USB as a connection, the charging circuit is adapted accordingly and, if necessary, limited accordingly. Nothing should happen to the battery, especially since the actual charging circuit is not in the power supply, but in the cell phone.

The cell phone therefore also regulates the charge and if the cell phone can't explicitly request a high-performance mode supported by the power supply unit, the device is charged with less power so that nothing can happen to the device.

So nothing should actually happen

First you have to see what voltage (s) and current (s) the original Samsung power supply can deliver at the secondary output, and what these values look like for your spare power supplies. They may only be weaker than the original Samsung power supply, or may not support quick charging.

The phone regulates its power consumption via the USB port itself, and as long as the voltages of your laptop power supply for USB are all within the norm, nothing can break on the cell phone / battery.

Have a look in the device settings of the phone whether there's a selection option for different charging modes.

So a power supply is not an air pump, you can't charge the battery until it bursts, the buyers determine the current. Applies to all consumers on the PC.

Smaller power supplies produce smaller currents. 65W generates a quick charge, so it brings more mW charging current.

is no wonder, but must be so

So it has already loaded faster via the normal power supplies.

subjective statement, may or may not be

A "normal power supply" charges with the standard charging current of 500mA. The charging time for 4000mAh is about 10h for full charge and a little less than 8h for 75%.

https://www.akkuladezeit.de/index.php

Your (broken) original power supply charges with a charging current of up to 3A / 5V and therefore the battery is full after 1h44 min and 75% full after 1h18min.

Modern USB power supplies make up a charging current and a charging voltage with the connected device. If the device can't negotiate anything, it remains at 500mAh at 5V.

The 65W power supply will probably also make up a charging current of 3A to 5V with the S10plus and is therefore just as powerful as the S10plus power supply (which you can buy for less than 15 euro by the way).

So, everything within the scope of the technical predictions and wonderfully explainable.