Don’t forget the frog battery https://en.wikipedia.org/wiki/Frog_battery https://en.wikipedia.org/wiki/Frog_battery And quite a lot of others: https://en.wikip

Don’t forget the frog battery https://en.wikipedia.org/wiki/Frog_battery https://en.wikipedia.org/wiki/Frog_battery And quite a lot of others: https://en.wikipedia.org/wiki/List_of_battery_types https://en.wikipedia.org/wiki/List_of_battery_types