I'm not exactly sure what's going on with my Oticon BTE hearing aid. I have two but its only the left one with the issue. I had bought Kirkland Signature hearing aids and have noticed a bit of brown like substance appearing on the battery and in the battery compartment. Is this battery acid leaking out from the battery or is it something else?
This issue has not happened with Duracell batteries
This issue has not happened with Duracell batteries