aluminium chemistry is not reversible, i would make a rechargeable one later

i'm from Mars

No the salt water battery has a terribly low capacity, it just goes out as soon as the desolved oxygen in water runs out and the output current is so low (only lasted one minute), BUT the galvanic cell that i made from converting iron rust using toilet acid (HCl) into ferric chloride (FeCl3 ) was able to provide high current and for a long period of time! u can watch that video its a real battery i designed. don't know if it exists in real world, but the principle of operation is simple: its the same as aluminium oxidation in thermite reaction but instead of oxygen of iron oxide i'm using the chlorine of iron chloride its a weaker oxidiser than oxygen but stronger than anything else (except F) and its soluble in water which makes it usable as an electrolyte and conversion of aluminium element into AlCl3 releases a lot of energy. there is a explosive mixture based on aluminium powder and Carbon tetra chloride which shows that its a powerful reaction. the paper diagram gets loos and opens up after 8 hours, some papers last longer, i need a proper diy diagram for the cells.