On Friday, 26 January 2018 13:32:19 UTC, Terry Schwartz wrote:

I also refrigerate batteries, and I've got some Panasonic industrial C cells that are still at full cell voltage after more than 10 years.

I've still got some unrefrigerated ZnC & alkaline cells almost twice that age, so yours should last a long time yet. What I notice is that while most keep, a minority go from full to zero at some point. It's as if some sort of fault occurs internally and they then drain out.


NT