A rechargeable heater is an electric heating device characterized by a built-in rechargeable battery that can be charged through a USB charging cable or other charging methods. Its working principle is similar to traditional electric kettles or electric heaters, both of which use electrical energy to generate heat energy. However, the difference is that rechargeable heaters do not require a continuous external power supply, making them particularly practical outdoors or in environments without a stable power supply.

A rechargeable heater is a convenient and practical portable heating device that can provide users with a warm environment, especially suitable for outdoor and temporary heating needs. Attention should be paid to safety and maintenance during use to ensure the normal use and lifespan of the equipment.