Is there more info about this? I could only find Chinese forums like https://m-weibo-cn.translate.goog/status/OdaBMza1L?from=page_1005052963774131_profile&wvr=6&mod=weibotime&jumpfrom=weibocom

The chips (basic TTL logic, perhaps) are all DIP. This may predate the term “open source”.

Yes, get yourself eclipse glasses, a pinhole projector, a floppy disk, digital camera or whatever allows you to observe the eclipse safely – no phenomenon is worth risking your eyesight over. However, the consensus is that you can watch the sun flares without protection during totality. The totality lasted 0 to 4 minutes depending on your location.

…and ignore one of the coolest things there is to see on the sky

A solar or lunar eclipse?

Finally, I can calmly watch the performance of my stock portfolio

These powerbanks can set your house on fire if the chip shorts out: the wire gets very hot and melts through the plastic like this: Odysee/YT/Piped. I recommend installing a 2A (for 1A powerbanks) or 5A (for 2.1A powerbanks) automobile fuse in series with the cells or each cell individually.

toss

Don’t throw them out yet if they work flawlessly. Give them to someone you know or just leave them somewhere. Also, you might need your old iPhone for some reason and so you should probably keep one (possibly semi-broken) cable.