Every fire I have ever heard of is either:
- Cheap/Wrong Charger
- Cheap Packs
- No Balancer
- Trying to charge damaged packs
or a combination of the above
I know pretty much the whole Flightpower Team... we have probably charged 1000's (if not tens of thousands) of packs and I do not know of one incidence of fire.
BUT I still charge in a ceramic bowl with a lid and keep a fire extinguisher handy