Li-Ion battery behavior is very predictable these days. With a good battery management system (BMS) that includes temperature control, current limiting, charge

Li-Ion battery behavior is very predictable these days. With a good battery management system (BMS) that includes temperature control, current limiting, charge monitoring, and cell monitoring the things work very well and very safely. Good news: Most EVs have very good BMSs. Bad news: Lots of small consumer devices with Li-Ion batteries have lousy BMSs or none at all. Which is why their batteries don't last long and sometimes catch fire. If cheap manufacturers would stop trying to skimp on the BMS the problem would be over.