Turn On Low Power Mode
When all else fails and you need some extra juice for the rest of the day, you can use Apple’s new Low Power Mode.
This powerful feature will disable all the most power-hungry Apple Watch features at once, including the Always On display, watchOS 10’s new Time in Daylight feature, background heart rate and blood oxygen measurements, and workout reminders.
To turn on this feature, you need to press the Side button on your Apple Watch (or swipe up from the bottom on watchOS 9 or older) and tap the battery percentage icon. Then tap on Low Power Mode and scroll all the way to the bottom. Finally, select Turn On.
Make Every Second Count
As you can see, making your Apple Watch last as long as possible during the day isn’t that hard. All you need to do is know which features you have to change in order to preserve some power.
You can use a couple of these tips or use all of them to make your Apple Watch last as long as possible.