If your Apple Watch won’t charge, it may be unexpectedly draining its battery and you won’t see the charging indicator when you try to charge it. These troubleshooting steps will help you charge your Apple Watch or get it repaired if there’s a deeper problem.
How to Fix Apple Watch Not Charging Issue? RED Lightning on Screen
An Apple Watch will not charge if there is no proper connection to the charger or if the charger is not properly connected to a power source.
It is also possible that there is a software problem. Once the watch is restarted, charging will start again.
Finally, a hardware defect could be the reason your Apple Watch won’t charge. In that case, you’ll likely need to return the watch to Apple for replacement. You can also take it to a repair shop for a professional repair.