I was reinstalling the one day old Costco 312 batteries in my Kirkland Sig 5 hearing aids. I dropped one and it went immediately down the drain to the water pool in the trap. It was a bathroom sink so I was able to disassemble the trap without any tools, I estimate the battery was under water for about 5 minutes. I dried it and installed and all seemed well. But within a few minutes I got the low battery signal.
I let the battery air dry the rest of the day but it soon dies when installed in a hearing aid. Is this just a coincidence or does submersion in water destroy this type (zinc air) battery?