How does a rechargeable battery work?

You can compare the operation of a rechargeable battery with a battery of a car. When it’ s empty, it can be recharged and used again. With the best possible treatment, these batteries can be recharged up to thousands of times. Because of its constant power (1.2 Volts), a rechargeable battery has virtually the same power from start to finish. Then it stops quite suddenly and has to be loaded.