Free Electric Hand Warmer/Stove





Introduction: Free Electric Hand Warmer/Stove

Small nine volt heater. Stop at step three for the case and the battery clip.

Step 1: Tools and Supplies


Ni chrome wire or thick steel wool type thing, different thicknesses and lengths heat differently. Some wire will need more voltage to glow red hot.

9 volt battery w/ metal case


Some kind of adhesive


Soldering iron

Utility knife

Flat head screwdriver


Step 2: Dissecting the Battery

Use your screwdriver to pry open the top of the battery. Inside the battery are 6 AAAA cells (you need everything but these and the bottom cover).

Step 3: Creating the Heating Element

Cut about 1" of whichever wire you are using and solder both ends onto the contacts on the backside of the top cover of the battery (the picture explains it better). You can also stop here and solder wires onto the contacts to use it as a battery clip and use the case for whatever you like.

Step 4: Install Heater Into Case

Apply your adhesive to the BOTTOM of the battery case and slide in the heating element. Try not to let the wire touch the side of the case. Wait for the adhesive to dry.

Step 5: Finishing Touches

I used the utility knife to poke holes in the side of the case.

Step 6: Testing

To test your hand warmer hook up a fresh 9 volt battery to the leads on the hand warmer. If it works then the wire inside should glow orange. DO NOT LEAVE THE BATTERY ATTACHED TO THE HEATER!!!, by doing that you are shorting out the battery and the battery will begin to heat up. To use your hand warmer attach the battery in pulses until your hand warmer is at desired temperature. If your hand warmer works than it is because the wire is resisting the flow of electricity and giving off heat as a bi product. I am proud to say that this instructable was created using recycled materials! Please do not actually TOUCH the hand warmer while it is hot. This is made so that you can use it as a small stove or warm your hands OVER it. I do not recommend sticking hot metal down your gloves.

Step 7: Thanks and Liability

Thanks for viewing my instructable. I am not liable for any burns or injuries caused by this instructable. I appreciate your ratings and comments and please vote for me in the epilog challenge. And remember to check out my other instructables and keep working to save our planet.
Thanks again.



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    Well while your at it will also show use how to get 9v battery acid off outer hands :)

    this isnt a good idea

    thank you very much

    It may be safer for you to use a 5W power resistor and mount it to the metal case. That way, you can control the current with I=V/R. 0.5A is okay for AA batteries.

    Here's a safer way to do this, get a small 12v bulb such at those used on car interior (dome) lights & wire it to an old 9v battery top as you've done here. Safe & cheap,cheap, cheap ...

    If your worried of explosions (which I doubt) you could use a resistor of the right value.

    terrible idea. Shorting a battery can make it explode emphasis on EXPLODE

    I believe all batteries sold in the US are required to have vents to vent gasses outward to prevent "kasplosions". This includes AA, AAA, C, D, and 9v batteries. Older batteries do not have vents, which is probably where you got this idea.

    I still wouldn't trust concern, but it is a good idea other then that...