Does oxygen even factor in to a lipo fire? I thought lipo fires were a chemical reaction/ runaway condition? Don't think oxygen starvation or water have any effect at all. If you read the reports on the 787 battery pack that lit up at the gate, the fire dept who went in and tried to put the fire out said they had trouble as their conventional methods weren't working.

It sounds like sand works to at least contain the heat created by the reaction. Water likely only cools it down.

Sounds to me like the only safe solution is to keep them away from structures. The scary part is the scenario where you charge your batteries safely, throw them into the car and head for the field only to have them go off long after they're removed from the charger. Think Dave Searles lost his rv this way.

PaulD