ZeniPower hearing aid batteries and cochlear batteries is the only zinc air button battery manufacturer in China. With over 21 years in research and development and a patented unique technology, you will be satisfied with ZeniPower zinc air batteries for the following applications: Hearing aids using zinc air battery size A10 to A675. You can expect fewer battery replacements, clearer tones, less distortion, fewer volume adjustments, and longer service life. Additional Details ------------------------------ Product description: ZeniPower hearing aid batteries and cochlear batteries is the only zinc air button battery manufacturer in China. With over 21 years in research and development and a patented unique technology, you will be satisfied with ZeniPower zinc air batteries for the following applications: Hearing aids using zinc air battery size A10 to A675. You can expect fewer battery replacements, clearer tones, less distortion, fewer volume adjustments, and longer service life.