Battery-run heaters include the 12-volt car battery heaters, hand and body warmers, space heaters and hybrid gas/battery heaters. These heaters provide an alternative source of heat.
The 12-volt car battery heater has the ability to heat a cabin and does not require direct connection to the heater, but it is usually connected to an inverter. Hand and body warmers are portable and provide heat to people during the cold seasons. Space heaters heat up the air in a confined room and depend on the energy of the batteries. Hybrid gas and battery heaters combine the energy of the battery with the combustion of the gas to provide heat. The battery ignites the gas, which burns to provide heat.