Power Reserve

What is Power Reserve on Apple devices? How does it work? What’s it good for?

An image showing a red power icon in the middle, set against a dark-patterned, slightly distorted background

Power Reserve mode allows you to use certain features when the battery is low or the device is completely turned off. It runs your device on low energy until the battery is fully depleted, letting you access features like Apple Pay that don't require the operating system to be up and running. In this guide, we're going to explore how Power Reserve works, see which devices support this handy feature and learn what you can do with it.

How to switch to Power Reserve mode on watchOS 3

If you are not closely tracking every subtle interface change that Apple puts into practice on iOS, macOS or watchOS, it is likely you have entirely lost sight of a smaller feature or setting before. This is because, in short, Apple likes to relocate and thereby slowly supplant features no longer withstanding the test of time. With watchOS 3, the complete renovation of the operating system and reinvention of the Side button on top of it has had a similar ripple effect for numerous older features.

Power Reserve mode has become one of such cases, a feature still of much use despite the improved battery performance on Apple Watch Series 1 and 2. It used to be as easy as holding down the Side button and swiping to activate Power Reserve, but mind you, nothing is permanent with Apple and it has been silently relocated since. In case you have been caught napping on Power Reserve, let's quickly fill you in on how to deploy the potential life saver on the latest watchOS.

Turning on Power Reserve mode on your Apple Watch

Apple Watch in Power Reserve mode showing just the current time on its watch face

Power Reserve mode is a feature of watchOS that let's you conserve what's left of your battery when you get low on juice by limiting your Apple Watch's functionality to nothing more than a time piece.

Starting with watchOS 3, the steps to enable it has changed, so we'll show you how it's done.

How to use Power Reserve mode on Apple Watch

To save power when your Apple Watch battery is low, Apple has implemented a featured into watchOS called Power Reserve mode. This mode allows you to extend the life of the Apple Watch battery by sacrificing general device functionality.

How do you enable Power Reserve mode? How do you exit Power Reserve mode? These questions and more are answered in this latest entry into our Apple Watch guide.

Apple Watch reportedly has Power Reserve mode, displaying only time

The New York Times reports the Apple Watch will feature "Power Reserve" functionality, in order to stretch the wearable's battery longer and make for less frequent charging.

Apple has said the watch battery is estimated to last a full day, requiring a user to charge it at night, similar to a smartphone. The low-power mode will display the time only, the report says, and will be able to do so on even very little battery.