How to Charge an Apple Watch
The Apple Watch comes with a magnetic charging cable that plugs into a power outlet or a USB port. Position the back of the Apple Watch on the supplied charger to charge it, and the charger’s magnets will align the watch with the charger. A green lightning bolt appears on the watch face when it is properly aligned, and charging begins.
Battery Life
Apple engineered the watch to have an 18-hour battery life following an overnight charge, on the assumption that you’ll wear your Apple Watch all day long. That estimate is based on checking the time throughout the day, receiving notifications, participating in a 60-minute workout, and using various apps. Battery life varies, depending on how you use the Apple Watch. Apple’s estimates for battery life for the Apple Watch Series 5, 4, and 3 are:
Typical all-day use: 18 hours.Calls placed from Apple Watch: 1.5 hours (1 hour for Series 3).Indoor workouts: 10 hours.Outdoor workouts: 5 to 6 hours (4 to 5 hours for Series 3).Music playback: 10 hours from Watch storage or 7 hours streaming with LTE.
Use Power Reserve to Save Battery Charge
When the battery charge reaches 10%, the Apple Watch asks if you want to enter Power Reserve mode. If you choose not to, when the battery charge gets lower, the watch enters Power Reserve automatically. In the Power Reserve mode, the Apple Watch no longer communicates with your iPhone and you can’t use other watch features. You can see the time on your watch only by pressing the side button. Power Reserve mode can conserve battery life at any time, not only when an Apple Watch is low on power. Here’s how to enter Power Reserve mode: