What happened to librem anyway? They used to be all the rage, now it’s nothing.

What is the battery situation like?

The older, cheaper devices are obviously, well, older and thus the battery degraded a bit. Linux isn’t exactly optimized for these things either. I would expect less than great battery life.

Self heating batteries. Basically a small heater to get the battery into a more suitable temperature range. Super simple solution and since batteries produce heat while charging anyway, you just need a bit of heat to kickstart charging.