specially when I don't see anyone, I don't want to keep sweeping my eyes through mirrors...
those that don't use blinkers at all do use mirrors, right? OH.
Adding a high quality smart switch to a 5-year old battery might do some good, of course. But this is a cluster of old batteries, all in bad shape for many years of usage under different circumstances, temperatures, etc. And they're all different models. Each battery will need a different time for going from 20 to 80%... it's wild.
I do this kind of risk assessment on the worst scenario, a fire could turn your home into ashes. The only option to me, being strict, would be removing those batteries (after all, your main goal is to re-use the other hardware.) But that's only possible in a handful of phone models... it's just unfortunate. I guess I should get a FairPhone next time!
Does any of these products come from the french Guiana?
I reckon your reasoning is very tongue in cheek. Latinoamerica has a lot of culture and products, there's no need to stretch definitions. And, honestly, it's a bit infuriating that people would do such thing even if it isn't ill-intentioned because there's a history of colonization (past) and cultural apropiation (present). For example, see the history of chocolate or where the biggest current brands reside...
Anyway, I don't mean to flame your contribution but had to share my honest viewpoint..
Cheers.