[kupfer]

If the phone is rooted, you can use Advanced Charging Controller to cycle it between min/max values. That would only prolong it, of course.

[password4321]

https://github.com/Magisk-Modules-Repo/acc

also mentioned at https://news.ycombinator.com/item?id=27576120#27578301

and related https://news.ycombinator.com/item?id=31325191#31325561 (laptop)

Also, an alternative to termux, https://github.com/CypherpunkArmory/UserLAnd found https://news.ycombinator.com/item?id=30119029