[yaky]

I read about lithium-ion and LiFePO batteries on Adafruit a few years ago, and saw similar projects elsewhere. The bootloader stuff is on Maemo wiki, along with tools to flash the device (which is also a bit of dark magic arts to me).

TBH, I didn't / don't exactly have a path. I started with Raspberry Pi (and Linux for the second time) 10+ years ago, which led me to Arduino, which led me to low-voltage electronics in general. At the same time, I had an unreasonable dislike of google, which led me to flashing LineageOS on a test phone, which then became my main phone, which eventually led to PinePhone, which didn't work out, but was fun.