reserve mode so I thought it would still track my movements/steps etc.
If the battery is truly dead, no, it doesn't track steps. It needs power to do that. A dead battery means no power. No power means no step tracking.
I didn't realize until later in the day that my Watch battery had died. I was in
wait until your AW's battery dies · go for a walk (without your iPhone) · charge your AW and · check if it adds your steps to Health.app.
After four days without charge, Reddit user Glarznak found an app on his Californian-built phone had recorded his steps, meaning motion ...
The Health app on iPhone can help you set a sleep goal, and track your
Closing those activity goals and rings on your Apple Watch each day isn't easy.
You can track an iPhone using any iteration of the Find My app or iCloud's
5S apparently continues to track your movement even after the battery dies.
What happens to your Apple Watch when your iPhone runs out of juice