Hearing aid battery sizes can be identified by the color coding on the packaging. These batteries are usually supplied in blister packs of 6 pieces.
The most common sizes are:
- Size 5 — Red: mini in-ear hearing aids
- Size 10 — Yellow: mini in-ear hearing aids
- Size 13 — Orange: behind-the-ear and in-ear devices
- Size 312 — Brown: in-ear hearing aids
- Size 675 — Blue: behind-the-ear hearing aids**