For Android, there are a multitude of apps, such as Wattz that will tell you the actual voltage of the battery. Full may be 4.2V or 4.35V depending on the chemistry used. ACCA (root required) will let you limit charge rates and stop charging at a certain percentage.

Staying under 4 volts (around 60% for most phone batteries) will vastly extend battery service life. 80% is a bit less extension, but still far better than charging to 100%.

That's one hell of a battery

What phone is that‽

Jesus Christ that's a car battery

omg kilo milliampere

Charge it from a smart power supply from battery at 1 to 100% then it can show you the number of mah/h it took to charge it.

I have this power supply which also has USB-C https://a.aliexpress.com/_mrChiQ6

My phone has a 10.8Ah battery and it's huge, no idea how big that must be.

22Ah at 4.35V would be 96Wh, which iirc is just under the limit of 100Wh you can take on flights in the us, and thus the limit for basically all laptops.

mAh are a terrible way to measure capacity, look for watt-hours instead. You need to know the voltage for it to be a relevant measurement