Our review of the earlier cell testing data suggests that a more conductive electrolyte may improve total cell performance, primarily as a result of reduction of IR-loss in the electrolyte tile or matrix. This IR loss contributes significantly to cell performance loss. However, electrode performances could not be correlated very well with either potassium content or electrolyte conductivity, primarily due to possible off-setting effects in cathode kinetics, mass transfer, and ohmic resistance inside this porous electrode. The cell data discussed above concerned only short-term results and thus only the effects on performance were studied. The problems affecting endurance, e.g., corrosion, NiO dissolution, and matrix support stability could not be analyzed in these tests. This review therefore indicated that optimization of electrolyte composition is potentially available and could be beneficial to arrive at an optimum combination of performance/endurance and cost factors. Further systematic and careful experimental work will be necessary while emphasizing the need for repeatability and long-term stable and representative conditions. ERC feels that an important part of our approach must be to emphasize duplication and repeatability as well as relatively long-term, large cell, testing. All parameters, except electrolyte composition, will be identical so that definitive data will be developed with regard to the electrolyte performance.