Inertia reel into power supply
I tend to hot dek and carry my piower supply with me all the time. THe annoying thing about this is the way the power cable and power supply seem to be strabngers to one another. They have not been designed for purpose. So whay not look at incoproating a inertia reel or make it easier for users to wrap the cable round their power supply?
Taking the idea further you could also consider including a way to dock the plug inton the power supply to keep it all secure and easy to pack and un pack.
My thinkpad from ten years ago made it easy to coil the power cable to the supply yet my current model Latitude does not.