Introduction

Over time, the wire coating of an Apple MagSafe Power Adaptor may deteriorate leaving the wires exposed and possibly subject to electrical shorts. By covering the exposed wires with heat shrink you can protect the power adapter and yourself while continuing to charge your computer.

Locate the damaged or exposed area on the adaptor wire. Move the wire connector away from the damaged or exposed area. Move the wire connector away from the damaged or exposed area.
  • Locate the damaged or exposed area on the adaptor wire.

    • Move the wire connector away from the damaged or exposed area.

Add Comment

Measure the approximate length of heat shrink to throughly cover all nearby damage with a single piece of heat shrink. The length of the heat shrink should be longer than the actual length of the damaged or exposed wire.
  • Measure the approximate length of heat shrink to throughly cover all nearby damage with a single piece of heat shrink.

    • The length of the heat shrink should be longer than the actual length of the damaged or exposed wire.

    • Use 3/8" diameter heat shrink. This size diameter is large enough to slide over the charging interface and small enough to secure itself on the wire when heated.

  • Cut the heat shrink to appropriate length using scissors.

You may want to note that the heat shrink should be big enough to slide over the end of the charger. This might be harder with the newer Mac chargers, cause the adapter is bigger.

Jacob Reiter - Reply

Deck the Halls
With tools and Fix Kits
Slide the heat shrink over the the wire until it is over the damaged or exposed area. Slide the heat shrink over the the wire until it is over the damaged or exposed area.
  • Slide the heat shrink over the the wire until it is over the damaged or exposed area.

Add Comment

Use a heat gun to apply heat to the heat shrink. Continue until the heat shrink has shrunk and is tightly attached to the wire.
  • Use a heat gun to apply heat to the heat shrink.

  • Continue until the heat shrink has shrunk and is tightly attached to the wire.

    • When heating, always keep the heat gun moving around the heat shrink. Do not apply heat to one location for too long. Overheating the heat shrink may cause further damage to the wire or wire coating underneath, and may melt the heat shrink itself.

    • Optional: Apply multiple layers of heat shrink if you think the wire will be used in more strenuous situations and want to ensure its protection and durablity.

If they used this on a newer charger, the heat shrink might not shrink all the way, because it will have to be too big to fit over. You may want to create a note or warning at the beginning that for cables with larger adapters, like USB, the old ipod 30-pin connector, or the new magsafe mac chargers.

Jacob Reiter - Reply

The 3/8" in Heat Shrink Tube has a maximum shrinking capacity that is larger than the Mac Charger Wire's Diameter. So to create a proper hold, we need to increase it's diameter in some way. Wrap around it with an electric tape or this sample red wire covering in the picture, to increase it's diameter before shrinking  it all the way into place. Since the end of the charger has a bigger diameter than the wire, it seems to have a nice snug fit. If you feel it is necessary to add more body in the diameter of that part then just cover it with electric tape, etc, before shrinking the heat shrink tube in that area.
  • The 3/8" in Heat Shrink Tube has a maximum shrinking capacity that is larger than the Mac Charger Wire's Diameter. So to create a proper hold, we need to increase it's diameter in some way. Wrap around it with an electric tape or this sample red wire covering in the picture, to increase it's diameter before shrinking it all the way into place.

  • Since the end of the charger has a bigger diameter than the wire, it seems to have a nice snug fit. If you feel it is necessary to add more body in the diameter of that part then just cover it with electric tape, etc, before shrinking the heat shrink tube in that area.

Add Comment

Once the heat shrink has shrunk, flex the wire in different directions to ensure the heat shrink is properly attached and secured to the wire. Once the heat shrink has shrunk, flex the wire in different directions to ensure the heat shrink is properly attached and secured to the wire. Once the heat shrink has shrunk, flex the wire in different directions to ensure the heat shrink is properly attached and secured to the wire.
  • Once the heat shrink has shrunk, flex the wire in different directions to ensure the heat shrink is properly attached and secured to the wire.

Add Comment

Conclusion

Apple MagSafe Power Adapters typically range from $70-$80. By following this simple repair you can save money and continue using your power adaptor. People with similar wire coating issues and different power adaptors can hopefully find this repair guide helpful since the repair process is nearly identical.

18 other people completed this guide.

Ryan Mostofi

Member since: 04/09/2015

670 Reputation

1 Guide authored

Team

Cal Poly, Team 28-6, Green Spring 2015 Member of Cal Poly, Team 28-6, Green Spring 2015

CPSU-GREEN-S15S28G6

4 Members

5 Guides authored

5 Comments

Thanks! Wish I had seen this repair technique a long time ago... would have saved a lot of money on buying new power supplies and an expensive laptop repair when a cracked cable shorted out. Much appreciated!

Catherine Todd - Reply

This method fried my cable and it stopped working… Do not recommend anyone to try it. Now I have to buy a new one…

John Myr - Reply

Minimum sensitivity required. I think you missed the part where it reads…

“When heating, always keep the heat gun moving around the heat shrink. Do not apply heat to one location for too long. Overheating the heat shrink may cause further damage to the wire or wire coating underneath, and may melt the heat shrink itself.”

Albert Einstein -

where do i get the red stuff??

Sammy Danger - Reply

Search “spiral cord protector” on amazon or aliexpress :)

Jonathan Parsons -

Add Comment

View Statistics:

Past 24 Hours: 56

Past 7 Days: 399

Past 30 Days: 1,485

All Time: 41,256