And wonder about the various types in use. A household has a raft of them in small devices, on chargers at any time. Then there are zillions of them on construction sites and home work shops, garages, in rechargeable tools-on charge at any time.

I'd like the description of each types fire hazard, specifically, the LI's on that boat.

It seems outrageous that a boats batteries could ignite by overcharging(a real concern). That's simply not a risk to take.