the issue of charging brings up the issue of expansion. Eletralasis creates gas. The very little info i could glean on aquous alkaline cells, seem to indicate that crystals form if the electrolyte is exposed to the air. So you need an air lock. So you need to run your cell vent line into a jar of water, or put a check valve on your vent line. Of course enclosing an entire battery or a single cell requires a some thought into how to run the wires out yet seal the unit. Always striving to makee it simple and cost effective, i'll forge ahead on this matter.
Reading about Zinc/air batteries and their relatives got me thinking, the reaction only has to happen with one of the plates. The other plate is to transfer the opposite polar current. Looking at an typical alkaline paste cell, the reaction seems to be with the zinc in the center (negative post). The container is simply to tranfer the positive side of the action. Remember nobody has told me if this is right or wrong. But between the experiments and the research, the use of copper tubing, i believe, was not a good choice. I've always been creating a reaction with the zinc plated tubing, but aluminium will be the next replacement for the copper tubing.
