Now you done it.

You got my paranoid antenna up.

Since I have no outdoor storage option, and out door temps here can range from -30°F to +110°F, everything must be in the house.
I am now building a battery storage / charging box.
The box will be welded up out of steel.
There will be a thin plastic sheet 3 inches below the top.
Above that sheet there will be 3 inches of dry sand.
The box will be vented through the wall to the out side.
The door will have the same type gasket as you would have on the door of a wood burning stove.
The box will be bolted to the basement block wall, with the charging station right next to it. It will vent out the same window as my dryer vent.

The theory is that if a battery should lite off the heat will melt the thin plastic sheet and bury the battery in sand. Any smoke or fumes will vent to the outside of the house.

Until this thread I never knew that a lipo was still dangerous after it was taken off charge. I had got into the habit of removing the lipo from the jet before charging but then putting it back into the jet immediately after charge was complete.

I will have to get some ammo cans for transporting batteries to the field.