Hi Stefan, I am not sure that alumium is good for making lemmon batteries, as it oxidizes almost instantly. The thin oxide layer protects the metal from further oxidation (so you won't see any oxidat
Hello Rik, Yes, aluminium seems to be not a good choice. I've now stacked 3 lemon batteries and added 4x4700uF in parallel (unfortunately i cannot find the 10F gold cap that i thought i have here) bu