Random Teardown #018: P3 P8420 Rechargable Hand Warmer @TheUbuntuGuy
Random Teardown #018: P3 P8420 Rechargable Hand Warmer  @TheUbuntuGuy
Uploaded December 2015 | Updated September 2026, 2 weeks ago
This thing was working fine last year, but upon digging it out, the switch seems to have oxidized. Too bad they didn't thermally bond the heater to the case, that would have made it much more effective.

I'm working on the next pfSense video, hoping to get it out before the end of the year.

I have a second channel:
youtube.com/channel/UCN3Dgu6CVBcecDkc5DmIIqw
Random Teardown #018: P3 P8420 Rechargable Hand WarmerLCR-T4 Universal Tester Waveforms
Mark Furneaux |

Random Teardown #018: P3 P8420 Rechargable Hand Warmer

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