My Apple Watch is charging way too slow after watchOS 10 update

[Johnnx1991]

Hi, I've noticed my Apple Watch is charging much slower since updating to watchOS 10. It's only hitting 80% charge after several hours on a reliable charging cable, whereas it used to fully charge in just a couple of hours before the upgrade. Has anyone else experienced this?

 

[MacsBug]

This is actually typical behavior. Your watch will charge only to 80% most times and then once a week or so charge to full. You can force the watch to charge to full by tapping the screen as soon as you put it on the charger and selecting Charge to Full.

You can read about it here: https://support.apple.com/en-us/105106

 

[Rodananne]

It's designed to prolong battery life and is the same as Optimised Charging on your iPhone.