Emergency Battery in the Wilderness

Step 4 Use it in the Wild

All things we used in the experiment, are replaceable by things you find in nature, or which you have in your camping gear:
- vinegar or lemon juice = replaceable by your own puke or urine
- tape = replaceable by rope, flexible liana-like branches, strong grass. Or maybe you just have tape with you(always take tape with you on camping!)
- aluminum foil = replaceable by the aluminum from food-wrappings, cans, if neccesary from your lightweight cooking set, or anything else lightweight, which is often made from aluminum.
- paper = replaceable by leaves. You have to wrap them around eachother to make the tube, so big leaves are the best.
- paper towel = replaceable by some earth, because it should just hold the sour stuff together.
- a bowl = replaceable by a little tamped hole in the ground.
- coins are the only things that aren't replaceable. But I think you should always take money with you on camping, even in the wild.

Most flashlights are like the one below, with two batteries in a series. This is the perfect shape to make a battery like in this instructable. If there's place for only one battery, The voltage may get too low, so you should use the space you have more effectively, if you make the layers of aluminum and sour fluid as thin a possible, then there are more 'little' batteries in the series, making a higher voltage.

It's a luck that the copper coins are mostly the smaller ones, so even for small flashlights, with AA batteries, you can make the batteries yourself.

good luck with not dieing.