It is a quick, and easy method to permanently or temporarily, shorten any cord
and best of all... it does not required anything other than the cord itself; no metal twist ties or plastic zip ties!
The cord is shortened by using a series of slip knots (also known as a crochet chain stitch). The stiffness of the cord holds the slip knots in place but a locking tuck at the end will ensure the knots will not come undone.
But, if the shortening is temporary...skip the locking tuck, and a tug on the cord unravels the knots for use of the full cord length in an instant.
Use it to manage charging cords...it will extend in a second to use the device while still plugged in.
Step 1: Spagetti
Most of the time the devices used with a lap top are only a couple of inches away and all the extra cable spills around (or off) the table.
With this solution, a 5 foot cable can be shortened to about 1foot (using 1" dia. loops)
(And don't worry the pesky electrons don't seem to mind the twisted path. They still manage to find their way back and forth.)
Step 2: Make a Loop
In this case it is the large connector on a USB cord.
1. Make a loop in the cable near the end of the cable.
Note: the fixed end (connector end) is under the working end of the cable
Step 3: Cross Behind
Step 4: Pull a Loop
Step 5: Cross Again
Step 6: Pull Another Loop
Step 7: And...Repeat
Step 8: Loop Size
Do not pull the knots too tight. The cord will kink and the knots will not release smoothly when the cord needs to be extended.
Step 9: Lock the End
This turns the last slip knot into a regular overhand knot preventing the series of slip knots from cascading undone.
Step 10: Temporary Shortening
Even without the locking tuck, in most cases, the stiffness of the cord generally prevent the slip knots from unraveling without an intentional tug.
I use this when I may have to answer the phone while it is still plugged in.
Pulling the cord starts untying the slip knots from the working end.
This allows only as much cord as needed to pull free; the remaining knots will keep the balance of the cord in check.