Is there a list somewhere of unprotected lithium batteries that have internal fuses? I thought I read somewhere that the 30Q is one of those batteries and I would be interested if there were more of them.
To answer my own question, I found this. https://batterybro.com/blogs/18650-wholesale-battery-reviews/18306003-battery-safety-101-anatomy-ptc-vs-pcb-vs-cid?_pos=1&_sid=bce27ba96&_ss=r
It appears most batteries have internal protection and if they trip some can be reset, but they say it's not a good idea to do that as the internal resistance goes way up after the first trip and can lead to a catastrophic failure the next time. Just what I wanted to know. Also mentions that the internal protection may not work when the batteries are in series or parallel configurations.
Most cells have an interrupter device, but that only operates just before venting, it’s a last resort and I would not rely on it.
Yeah, I just wanted to know if they have something, anything, before a big fail. I always top up all my batteries once they get to 3.6V or sometimes higher.