What are the precautions for using batteries?

We all know that the battery is a lot of electrical appliances will be used, but the battery in use there are some aspects we need to pay attention to, the correct use of batteries to better protect our electrical appliances. Specifically, the following areas require our attention:

(1) do not mix old and new batteries, and do not mix batteries of the same model but different types. (2) check whether the electrical appliances and battery contacts are clean, if necessary, wipe with a damp cloth, and wait for drying before loading according to the correct polarity. (3) do not disassemble or heat the battery at will. (4) after using the electric appliance should cut off the beginning, does not need to take out the battery for a long time. (5) do not regenerate the primary battery by heating, charging, or otherwise. No. 5 and No. 7 batteries can not be used in combination.