Ever wonder what is in one of those heating pads? Well you’re in luck, I have one here that stopped working. Of course I didn’t chuck it in the garbage, I took it apart and see what made it tick. Overall it is exactly what I expected, a few thermal cut out devices, one had obviously over heated and opened the circuit. It must have been hot for awhile before it disconnected the power though since the heat shrink and the plastic surrounding the area was heavily melted.
The wire was the most interesting thing of the disassemble, it has a very tough outer insulation and an internal metal heating element that is spiraled around a central core. I kept a some of the wire and might make some battery operated socks from it. Since it’s just a resistive heating element if I take a chunk that is about 1/12th the length of the original I should be able to power it from a FUSED battery pack. For now it’s another item in my ever growing junk box.
Have a look at the image gallery after the jump.
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