I think we all can relate to this problem. So many chargers to bring and each one is such a mess. Sprawling and tangled cable is the norm.
In thinking up a solution for this one, first I observe what the current design already allow the users to do. It turns out you can perfectly wind the cable around the charger body. However, there’s no way to secure the tightly wound cable from unraveling. It can sit still on the table but most users would like to bring it in a bag and not making such a mess later.
Since this is a failure of the last mile, my proposed solution is just a small tweak. A small clip will allow the charger head to secure itself to the wound up cable and prevent the whole thing from unraveling. Then users can happily toss it in the bag and carry on.