Cambodia Through My Eyes

Upcycling: Reviving My Electric Mosquito Swatter with a Headlamp’s 18650 Battery and Type-C Charging

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H1: (Introduction)

Opened purple mosquito swatter showing internal circuits and headlamp parts.
The teardown: Preparing to transplant the 18650 battery.

In rural Cambodia, headlamps are essential for every household due to the lack of streetlights at night. Recently, my electric mosquito swatter became useless after the 220V charging pins broke and the lead-acid battery died. Instead of throwing it away, I decided to give it a second life using a 18650 lithium battery from a scrapped headlamp.

Purple 18650 battery soldered inside with its protection board.
Safety first: Always keep the original protection board when transplanting lithium batteries.
Type-C port on the casing fixed with 401 glue.
Goodbye 220V: Now I can charge it anywhere with a smartphone cable.

H2: Steps

  1. (Scrapping): Retrieve functional 18650 lithium batteries from scrapped headlamps.
  2. (Port Upgrade): Discard the original cumbersome 220V plug, add a Type-C female port, and reinforce the structure using 401 adhesive with PCB scraps.
  3. (Wiring): Connect the battery protection board to the circuit to ensure stable lithium battery output.
  4. (Testing): The high discharge efficiency of the lithium battery significantly increases the electric shock power, producing a crisper sound and delivering substantial “lethality.”

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