Apple earlier today released watchOS 7.3.1, which includes a fix for an issue that can cause the Apple Watch SE and Apple Watch Series 5 not to charge after entering Power Reserve mode.
In a support document published today, Apple explains the issue, which it says has affected “a very small number of customers.” Apple explains that affected users saw a problem with charging after the Apple Watch went into Power Reserve mode.
watchOS 7.3.1 is designed to fix the issue for customers who haven’t previously experienced it. However, those who already experienced the problem may need to get support from Apple.
Apple says the following:
What to do if your Apple Watch exhibits this issue
To check if your Apple Watch is affected by this issue, place your watch on the charger that you normally use, then wait at least 30 minutes.
If your Apple Watch still won’t charge, contact Apple Support to set up a mail-in repair free of charge. Your watch will be examined before service to verify that it’s eligible for free repair.