DIY Coin Cell Battery Charger for 0.3$




Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: How It's Done..

I designed and made the base with my 3D printer. If you want my design just drop me a comment.

If you don't have a 3D printer just make any base that can hold the battery with a good contact.

Then you will need to change the resistor that I marked in the video with a 33k one. It's not that easy to solder the resistor as it's less than 1mm! so if you are not skilled enough, you can use a bigger resistor with the same value (33k).

Then connect the output + and - to your copper and screw (make sure of the polarity to match the battery).

Glue the parts with some glue (I used thermal silicone).

And Happy charging!

Be the First to Share


    • CNC Contest

      CNC Contest
    • Make it Move

      Make it Move
    • Teacher Contest

      Teacher Contest

    2 Discussions

    Rajaa KahelAmandaF109

    Answer 1 year ago

    You can find the design link in the video description on YouTube :)