DIY Battery: Power an LED Flashlight with Pocket Change!

Step 3: Conclusion and Results

Install the battery in your flashlight, making sure it isn't wet or leaking and taking care to install it with the correct polarity. Once installed your flashlight should function! Congratulations, you have replaced your flashlight battery pack with pocket change. Your friends won't believe you, so be sure to record it and show them. Refer back to the introduction for how and why this works.

If you are having problems, make sure you don't have shorts in the cells (coins touching), your electrolyte is conductive and acidic or basic, and that the battery fits properly in the compartment. Check polarity, remember the cathode (-) is the penny side. If you look closely in one of the attached images, you'll see I forgot too. :)

Make sure you rate this instructable for your fellow users! Every time you rate an instructable it helps the entire community.

Remember to vote for this Instructable in the Make It Glow! challenge. We just made something glow (blindingly) with spare change! Also, vote in the Pocket Sized Contest, since it is pocket sized, as is the flashlight, and it uses pocket change. Also entered in the Mad Science Fair.

Thanks for reading, be sure to comment and subscribe for more cool hacks.