Hearing aids are high-precision medical instruments composed of electronic components, which are high-grade electronic products, and there are a lot of things to pay attention to in the process of using them. The service life of hearing aids is a great concern for many patients, however, the life span of hearing aids varies greatly depending on each individual's use. Even a good hearing aid is also the need to have the right way to use, in order to make the service life of the hearing aid to extend, learn to maintain the hearing aid, can effectively reduce the maintenance of hearing aids.