Hearclear hearing aid batteries are backed with over 22 years in research and development with a patented unique technology. HearClear batteries are suitable for hearing aids using zinc air batteries sizes 10,312,13,675, and cochlear implant devices. Additional Details ------------------------------ Product description: Hear Clear batteries are well known for their high quality performance and durability as well as the following highlights: Long Shelf Life, 4 Years 1.45 Voltage, Zinc Air Composition High Power / High Capacity Leading Performance for High Drain / Wireless Streaming applications