If you want to order more batteries
but are unsure what size you need for your hearing aid, the old packaging can be helpful. Hearing aid batteries come in four sizes: 10
, and 675
. Don’t be confused by the additional codes, such as A, PR, S, ZD, ZA, V, DA, or ZL – these are less important. The size can be found on the front of the packaging, on the right, highlighted with the relevant color.