The principle of dry cell power generation

In fact, the dry cell is divided into two poles, a positive pole, a negative pole, and the positive pole is stored inside the positive charge, the negative pole is stored inside the negative charge, and the positive and negative charge to form a voltage, when there are electrical appliances connected, the negative charge will follow the line back to the positive charge that, and then the positive and negative charge bonding, which is the principle of work, as if the water tower, the water tower and the height of the ground to form the pressure of the water, and when someone uses water, the water will be left from the height. Water will stay from the height, the language expression ability is not too strong, forgive me, thank you!