Fireproof bag for battery good idea or too paranoid?

[Hubert]

I am somewhat on the paranoid side with these batteries, as I watched some scary videos on chain reactions when the lithium ion batteries catches fire after going into thermal runaway.   Do most people store indoors in fireproof bags or not really?   I think most people don't really go that far.

[purplerain]

Most people do not use these.  E-bikes fires are on the rise, but that could also be a result of more people getting into this growing trend. However, if it gives you a peace of mind and makes your sleep easier, then you should get one.  Only you know best.

The risky batteries are the budget versions you might see online.  For example, if normally a battery costs $800 and you see it for $200, this is likely aftermarket and corners might have been cut around safety.

[CityGuy]

Nothing wrong with being worried.  Thermal runaway is no joke, however most of the risk comes while charging, not just when the battery is sitting idle. So it’s important to never leave a battery unattended while charging and avoid charging overnight. If you are around and got a fire extinguisher near by then you are in a good spot.  For long-term storage, keeping the battery around 60% charge and in a cool, dry, non-flammable location is recommended. Using a fireproof bag can provide some containment and peace of mind, especially during charging or if storing indoors, but it’s not foolproof; not all bags can handle a full-blown thermal runaway. The most important safety measures remain using a quality, UL-certified battery, following good charging habits, storing it properly, and regularly checking for signs of damage like swelling or bulging.