In my previous post I made a battery of nails, copper wire and vinegar. This time I used salted water and 12 bottle caps instead of 9 to make a salt water battery and guess what, the LED burns as brightly as with the vinegar! You can also use plain water, but with salt it’ll work better.
How to make salt water battery
If you want to make this battery, just follow the instructions on how to DIY a vinegar battery and change the vinegar for water.