When the electric heater is charging, it always makes a "sizzling" sound and emits white smoke. Unplug the plug and find that there is yellow liquid flowing out, which smells like burning. Why?
It is leaking. Don't use it again. Safety is the most important thing. At present, there is an electric heating bag with charging safety setting, which is an external movable power switch. The whole switch is like a ∞ symbol. The upper corner of the symbol is the plug of the power supply, which is directly inserted into the socket on the surface of the electric heating bag. The bottom of the electric heating bag presses the bottom of the switch, the corner position of the symbol is movable, and the power switch is inside. When the electric heating bag is heated and expanded, the switch will slowly hold up, and when it reaches a certain height, it will be mechanically powered off. This is very safe.