Russ... the Gas ONE GS3400P that uses the 1# propane bottle in addition to the butane canister looks like a good candidate to replace my single burner bottle stove... I used it to pour through my low tech Mr Coffee for single cup coffee and tea for the 3 day outage during Irma...looks a lot more stable than the bottle burner...

anyone have comments about the propane version... I routinely refill 1# bottles during hurricane season

The Iwatani is a great little burner!

USB generally tops out at 4.5W, with most USB ports being less than half of that. A 12V power outlet in a car is generally 60W or more.

A 60W heater can provide just over 200 BTUs of heat: much, much less than any reasonable camping stove.

I might use a USB-powered thing to maintain a warm beverage, but I don’t think it would work very well heating cold water, and I sure as heck wouldn’t want to try it for boiling even a small amount of water.

If my reading is correct, there’s another adaptor that can be used which allows the stove to be fueled with a 20# propane tank. 20# of propane would keep you heating water and cooking for an extended outage.