Ok, nothing really blew up per say...I'm losing cells and not sure why. I'm not a computer science major, just some guy who watches youtube videos.
So I'm working on building a camera out of the pi HQ cam and code-wise it just got ready to hit the streets for the first time...but I also left it on long enough fixing some code to discover maybe we have a problem.
Here's a battery pack I put together out of a battery holder, and some 18650 cells, and this buck converter:
https://www.amazon.com/gp/product/B07PB ... TF8&psc=1
I've killed two cells now...wishing I was keeping track, but it seems like one will remain at full power while the other fully depletes. I'm also unable to recharge it after it happens. I'm running the pi 4, adafruit 3.2" screen and HQ camera off of the pack...not sure if that's too much. Happens after maybe 5 or so minutes and the screen turns white and starts pulsating.