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.

The working principle of a rechargeable heater is mainly to convert electrical energy into thermal energy through internal electric heating elements, and then use a fan to blow out the heated air, thereby achieving the goal of increasing the ambient temperature. Usually, this type of heater has multiple setting options, such as different temperature levels, wind direction adjustment, etc., to meet the needs of users in different scenarios.