https://hackaday.com/2020/09/02/building-an-open-source-thin...
https://beta.aceparent.me#/battery
And the related HN discussion: https://news.ycombinator.com/item?id=24319839
https://hackaday.com/2020/09/02/building-an-open-source-thin...
https://beta.aceparent.me#/battery