This is my homemade 9 plate hydrogen dry cell I made and is my own design.
4x4 stainless steel plates and homemade gaskets
I did the math and with the first bench test it produces about 0.8 LPM
The electrolyte solution is 3 tablespoons KOH to 1 gallon distilled water. About 1.18% KOH to water.
Plate configuration is as follows -NNN+NNN-