I was working on an LED project that involved some reasonably-sized lithium batteries, and the guy in the hardware store said "I don't want to hear about you in the news tomorrow". That really stuck with me, and I say it sometimes when I think someone's going to do something dangerous.
Yes, always have a fire plan in mind when starting a lithium battery project. They go up very quickly and generate a ton of choking smoke. It only takes one oopsie with a screwdriver or dropping a cell to start a fire.
That's why you don't touch Lithium Ion packs unless you know what you are doing. I've repaired many Bosch packs before I tried building my own and seeing the guts of professionally designed and robotically assembled packs after they're a few years old is a very sobering exercise in what to do and what definitely not to do.
There are a bunch of youtubers that go out of their way to give massively dangerous advice to people and I always wonder what their liability situation is.
While you are Not My Engineer and <disclaimers> .. are there any bloggers / vloggers that are or at least seem to be giving good advice that you are comfortable passing on?
Sure, life is all about risk - no doubt about that. But I guess I'm not tooling down the highway in a DIY contraption I built in my spare time with little regard for safety from plans I found on an Internet forum and parts bought from Ali Express.
Not to say that _you_ shouldn't do this ... just be careful out there!
