1. First, open the battery cover, usually the white button.
2. Second, remove the old battery. There is a small loop on the battery, so you have to push it hard.
3. Finally, insert the new battery according to the installation direction of the old battery, cover the battery cover and tighten the outer knob, and you're done.
It may be damaged.
Red Elf Solar cannot adjust the heating function. The heating pipe of the water heater may be damaged and you will need to contact the service center. There is a lot of scale inside the water heater and it must be removed before use.
Solar energy is a renewable energy source. It refers to the radiant thermal energy of the sun (see the three modes of propagation of thermal energy: radiation), and its main manifestation is often called solar rays.laries. Nowadays, it is typically used to generate electricity or provide energy for water heaters.