Size 10 batteries are the smallest used for hearing aids. Used on Mini RiE and CiC Hearing aid style.
Size 312 batteries are one of the most commonly used battery size. Used on Mini BTE, RiE, and ITC Hearing aid style.
Size 13 batteries are a little bigger than the 312. Used on BTE and ITE Hearing aid styles.
Size 675 batteries is the largest battery available for hearing aids. Used on Power BTE hearing aid style.

Please be aware of your hearing aid battery size. If you are unsure, please refer to your hearing aid user manual or feel free to reach out to us.