Apple watchOS 7.3.1 update to fix charging problems By IANS | Published on Tue, Feb 16 2021 11:18 IST | 0 Views Apple watchOS 7.3.1 update to fix charging problems. Image Source: IANS News San Francisco, Feb 16 : Apple has released watchOS 7.3.1 update with a big fix for those using an Apple Watch Series 5 or Apple Watch SE related to Power Reserve. "WatchOS 7.3.1 addresses an issue that prevented some Apple Watch Series 5 and Apple Watch SE devices from charging after entering Power Reserve," the company said in an update on Monday. The watchOS 7.3.1 update?? can be downloaded for free through the dedicated Apple Watch app on the iPhone by going to General and then Software Update.