(1) Check that the electrical and battery contacts are clean, wipe with a damp cloth if necessary, and load them with the correct polarity after drying;

(2) Do not mix old and new batteries. The same type but different types of batteries cannot be mixed.

(3) The primary battery cannot be regenerated by heating, charging or other methods;

(4) The battery cannot be short-circuited;

(5) Do not disassemble the battery or heat the battery;

(6) The switch should be cut off after the use of electrical appliances. The batteries should not be taken out in the long term.