RE: Long term storage of NiCd’s
One of the NASA studies showed that the best way to do long term storage on NiCad was to discharge each individual cell to zero volts using a slow discharge. Then a shorting bar was attached across each cell and then they were stored at a low temperature. I do not recall what the recommended temperature was but I think it was slightly below 30 degrees F. When ready to use them, let them warm up to room temperature and then give them a long slow charge.