How to heat your parked warm car in winter without gas or battery

It is a misconception that a tealight candle will produce a low fixed amound of heat regardless of modifications. If you make a mesh strainer heater, as shown in this substack (costs $1 and three minutes to make), it will improve combustion of the candle to actually magnify the heat produced by it. It keeps a warm car, warm in winter when you are parked for long periods (to use the net because they blocked your signal etc.) without use of car gas or battery.

Do not drive the car with a burning candle, common sense.

How to keep yourself from freezing in stranded broken-down car in winter