100W PTC Heating and Four Power Options
The heater is a 100W PTC element. PTC stands for positive temperature coefficient: as the ceramic heats, its resistance rises and the current falls, so it settles at a safe working temperature without needing a thermostat that clicks on and off. That is why Herrfilk can say it heats continuously for as long as it's plugged in without scorching the food. The same box runs from two cables: 110V/220V for a wall socket at home or the office, and 12V/24V for a car's accessory socket or a truck's 24V system. The trade-off is time. A 100W element warming a dense, fridge-cold meal through a steel base takes a while, and a full pot needs about 45 minutes in daily use, against the 20 to 25 minutes Herrfilk quotes. Soups and loose leftovers get there faster than a packed block of rice and meat.