Originally Posted by Chatooga11
Where is your cabin battery, Seb?
Protag, the battery that is currently under the seat is in no way sealed off from the inside of the van. Should I be worried?
Battery compartments that hold wet-cell batteries are supposed to be sealed to the occupied areas, and vented to outside. Methinks the battery under the seat should be an AGM regardless of whether the seat has a swivel mount of not, for safety.
The problem with wet-cell batteries is that, as they charge, they vent hydrogen gas. The danger of an explosion is low; the lower explosive limit for hydrogen is 4.0% and the upper explosive limit is 75%. Until the percentage of hydrogen in the air reaches at least 4%, nothing happens. But
the concentration of hydrogen right near the seat may be higher than in the rest of the van because it takes a while for diffusion to do its magic.
Now, if your front-seat passenger happens to light up a cigarette or create a spark of static electricity just when the battery is off-gassing hydrogen, there could
be a flash fire, but conditions would have to be just rightó or maybe that should be "just wrong."