The one I have, has ignition by batteries and it works. I have tested it today. The only negative I can say about it, is that even though it should be smell free petroleum, I can still smell the petroleum fuel. But since it's only for emergency use, it's alright.
Gas is neither my thing. It's poison amd I don't like gas inside my house. Well petroleum is not healthy either, but I think it's less health damaging than gas and I will only use it for emergency heat like if power goes to the heat plant I get my primary heat sauce from. That can happen with example a power cut and that is not unlikely to happen as here in Europe we are going in to a winter with limited energy supplies but also the climate changes can cause the heat to go like a hurricane or earthquake. So it's good to have a second solution in these dam times with war, energy crisis and climate changes.
Site note. In the US the fuel for this heater might better be known as liquid parrafin.
This is the heater I got.
www.qlima.com