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 675 hearing aid batteries the standard is a blue 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. 675A or R675A are both a size 675 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 312 (brown).