What is the charge in the hot water bag
The liquid in the bag is not ordinary water, which contains conductive material, hot water bag after charging, salt compounds will be conductive heating.
The hot water bag is filled with a salt compound.
Because of long time soaking in salt compound, electrode may be corrosion, rust, rust and salt into the compound, the conductive liquid will turn yellow, it will also reduce the resistance, the heating power of hot water bag increases, at this time, if the thermostat electric heater failure and non self resetting thermal circuit breaker, the heating temperature of electrode it may be more than 100 DEG C, lead salts and vaporization, will explode.