Step\/Method 1
Plug the power adapter completely with the Apple Magnetic charging cable or Magnetic Fast USB-C charging cable that came with the Apple Watch, and make sure the adapter is plugged into a power outlet.
Step\/Method 2
Check that the plastic film on both sides of the charger has been removed.
Step\/Method 3
Make sure that the back of the Apple Watch and the contact surface of the magnetic charger are free of foreign objects.
Step\/Method 4
If there are no above three problems, or can not be charged, do not recommend their own maintenance, may destroy the internal components, build to send to after-sales processing.