There is a small button in the middle and lower part of the battery cover. Press hard with a toothpick and slide the lid down to open it. You can replace it after opening it. The battery replacement method of armored belt is to have a small button in the middle and lower part of the battery cover, press it hard with a toothpick, and then slide the cover down to open it, and it can be replaced. Battery refers to a part of the space of a cup, can or other container or composite container containing electrolyte solution and metal electrodes that generate current, and a device that can convert chemical energy into electrical energy.