23 minute Adam Savage video with 2 people from Lumafield talking about x-ray scanning to check battery quality. Might be interesting but the article from a few months ago likely has the info without watching a video.

https://www.lumafield.com/article/finding-hidden-risks-in-the-battery-supply-chain

So this was the first thing I saw that made me think: 'oh, of course 4680 lights exist. Did some googling and found some lights and batteries, but not much in the way of chargers that would accept something that big. I guess most/all of the lights currently would have integrated charging.

Has anyone tried anything like this? Beyond 21700 in cell size?