>In such a situation, the best solution is slow charging, for which a low-power charger from your old feature phone is ideal.
It seems like most Android phones now have a feature that does this, though you have to enable it. Mine asked me to put in the time I go to bed and the time I wake up, and it slowly charges the battery over that time period to 100%
My Pixel just bases this off of the morning alarm clock. Since I don't like waking to an alarm, this just means that I have a permanent silent 9am alarm.
I do hope that USB PD and (to a lesser extent) Qi takeover the charging space. There is really no reason to have every SoC vendor create their own incompatible fast charging standard.
I never even strictly enabled it, but I'm a big fan. My pixel 5 from 2020 still easily gets a full day of battery life, and without direct evidence, I suspect always slow-charging has helped with that.
It seems like most Android phones now have a feature that does this, though you have to enable it. Mine asked me to put in the time I go to bed and the time I wake up, and it slowly charges the battery over that time period to 100%