Specifically, when a charging heater is charged, its internal heating element begins to generate heat and transfers it to the external container of the heater, causing the liquid inside the container (such as water) to heat up. Due to its portability, rechargeable heaters have a wide range of applications in various fields such as home, office, industry, and agriculture.

A rechargeable heater is a portable electric heating device that comes with a built-in rechargeable battery, typically charged through a USB cable, dedicated charger, or other charging methods. The design of this heater allows users to enjoy a warm environment even in the absence of a stable power supply, such as during outdoor camping, travel, or power outages.