This is a three piece charging stand designed specifically to hold the stock Apple Watch Charger. There is a channel in the arm for the power cable with little ridges to hold it in place. The three sections of the stand are connected with friction fit pegs. This is just my first draft, so there may be revisions in the future.
I printed this at 0.2mm to prototype, but I will definitely re-print at 0.15mm and I recommend you do the same. The arm needs to be printed on its side for strength, but the top and base can be printed flat.
Designed in Fusion 360 after taking caliper measurements of the Apple Watch Charger.