What are the precautions for carbon batteries?

Do you know what are the precautions for carbon batteries? Let me tell you about it. Precautions: (1) Check whether the electrical and battery contact parts are clean, wipe with a damp cloth if necessary, and load according to the correct polarity after drying;
(2) Do not mix old and new batteries, the same model but different types of batteries can not be mixed;
(3) It is prohibited to regenerate the primary battery by heating, charging or other methods; Do not remove the battery;
(4) It is prohibited to short-circuit the battery, beware of infants and children playing with the battery, especially to prevent infants and children from swallowing the button battery.
(5) The switch should be cut off after the use of electrical appliances, and the battery should be removed if not used for a long time.