How to Fix USB Cables

Written by mikhail polenin Google
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How to Fix USB Cables
For this kind of work, you would do best with a soldering iron like this one. (soldering woodburning kit image by Steve Johnson from

Your USB cable has a long lifetime, but in scenarios such as trampling your cable’s plug or your cat using it as a teething toy, its lifetime can be shortened significantly. You can fix a USB cable, but you can't always restore it to its original length. If you have a cable breakage, you must shorten the cable down to rescue it, which might cause you some inconvenience. Before attempting to repair a USB cable, think about your situation and determine if replacing it might be a better solution.

Skill level:

Things you need

  • Spare USB plug with a bit of cable leading from it
  • Soldering device
  • Electrician's tape
  • Wire cutter
  • Sharp razor

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  1. 1

    Disconnect the USB cable from any data or power sources.

  2. 2

    Cut off the plug on the damaged end of the cable with a small amount of cable still leading from it. If you had damage from cable breakage, cut off the cable with the wire cutter leaving the breakage on the shorter end of the cable, allowing you to salvage the longer end.

  3. 3

    Carefully scrape off the plastic insulation on your USB cable and your newly purchased plug’s trailing cable until about 1cm of wiring starts popping up from the insulation.

  4. 4

    Separate your wire clusters from both the cable and the plug each according to insulation colour.

  5. 5

    Switch your soldering device on and let it heat up. Melt the cables' tips with the soldering device. Don’t forget to also do this for your USB plug.

  6. 6

    Press the wires from the plug and cable against each other until your soldering job hardens up. Make sure you match wire colours with each other. Don't mix them up.

  7. 7

    Use some electrician’s tape to cover the exposed wiring.

Tips and warnings

  • Be careful when operating soldering equipment. Always take the safety measures indicated by the operating manual in your soldering device to prevent any risk of fire or skin burns.
  • Keep your fingers a fair distance away from the soldered cables even after they harden--they may still be too hot to touch.

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