Will these batteries fit my hearing aid?
Hearing aid batteries come in four sizes and often use the industry standard colour code for ease of reference. For size 312 hearing aid batteries the standard is a brown tab.
Manufactures often place a letter before or after the number or sometimes even both as part of their own process but they are still the same hearing aid battery size, e.g. 312A or R312A are both a size 312 battery. Different battery sizes are used to power different devices. If you are unsure which size you require, please refer to your hearing care professional or to the manufacturers manual for your hearing aid device.
The other available sizes are size 10 (yellow), size 13 (orange) and size 675 (blue).