Extension cord plugged into engine block heater.
What Is

What Is a Block Heater?

A block heater is an electrical device that warms a vehicle’s engine body and fluids to ensure the engine can start in winter conditions and freezing temps. Preconditioning the engine also puts less stress on the engine for driving through the cold. In such climates, engine block heaters are a popular option among truck buyers.

2022 Hyundai Tucson 12-volt power outlet.
What Is

What Are Power Outlets?

Power outlets, typically a 12-volt or USB, provide electricity as direct current (DC) for various objects ranging from navigation screens to phone chargers to in-car vacuums. Some cars have onboard power inverters and deliver alternating current (AC) power through power outlets that match household 3-prong outlets.