How to make a Homemade Battery
10 copper pennies
Salt water or lime juice (some have used soda but in a shtf situation salt water is best
These are the basics so you get an understanding of what our every day batteries are. To make this plan on a bigger scale is a thought. This can be helpful in running simple small things in the a shtf situation. But if you look on you tube people are do it much bigger!! ....but this is for a basic working knowledge.