Battery powered hand warmer

Picture of Battery powered hand warmer

This is my first instructable so be kind. I wanted to make a hand warmer that was battery powered and rechargeable. I welcome any and all criticism. If you have any questions please feel free to ask.

Step 1: Parts List

Picture of Parts List
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Tools & Parts

  • Heat resistant tape
  • Hot glue gun
  • knife
  • Soldering iron
  • Balsa wood
  • 28 awg wire (about three feet)
  • Switch
  • AA battery holder
  • Cover cloth
  • AA batteries

Step 2: Prep Work

Picture of Prep Work
  1. Start by outlining the battery holder on the balsa wood with a pencil. You will want to leave about 1/2 inch extra on the length to make room for the switch.
  2. Cut the stenciled rectangle out with a knife.
  3. Take 3 ft. of wire (I used 28 gauge copper bead wire) and wrap it around the wood (be sure to keep the wires from touching as you spiral it across the balsa).
  4. Tape the ends of the wire with a heat resistant tape to the wood.

Step 3: Install and Drive on!

Picture of Install and Drive on!
  • After finding a suitable place for the copper wire heating source. You will need to cut an appropriate slot for the switch.
  • After prepping the switch, glue in place with either hot glue or “CA”.

Step 4: Glue and Solder

Picture of Glue and Solder
  • Solder all connections in place and prep for the cloth cover. (heat resistant tape is amazing at this stage)!!!

Step 5: Finish with Hot Glue

Picture of Finish with Hot Glue
  • Hot glue the cloth to cover the heating coils.
  • Make sure to wrap fully around the heating coils(Don’t worry, the coils should not produce enough heat to cause harm… theoretically around 100 -140 degrees Fahrenheit)
  • After the cloth is secure, hot glue the heating aspect to the battery holder.
  • It should last between 1 and 2 hrs.
  • Enjoy the warmth during the winter!!!!!!

(Disclaimer: Ensure to properly check connections and aggregate temperature).


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