Hearing aid users generally keep a certain amount of batteries at home to avoid frequent trips to purchase them. Batteries have a self-discharge phenomenon during storage, which affects the life of the battery. Of all the environmental factors, temperature is the most important one. Too high a temperature will accelerate this self-discharge phenomenon. Refrigerators are generally refrigerated at 0 to 10 degrees, which is a very ideal place to store batteries. Another factor that has a significant impact on the storage of batteries is humidity. Too little humidity is not conducive to the preservation of the battery, and the refrigerator is a place where the humidity is relatively small, so when you put the battery in the refrigerator, be sure to use anti-evaporation bags to pack the battery well. Hearing aid batteries are generally zinc-air batteries. Once the protective film is removed from the positive electrode of the battery, air will enter the battery through the small hole in the positive electrode, and the battery will start a chemical reaction to release electricity. Even if the protective film is put on again, it cannot completely stop the reaction. Therefore, do not remove the protective film from the battery when it is not in use! Hearing aid batteries must be stored out of the reach of children, otherwise there is a risk of accidental ingestion by children!