Check battery percentage in the Watch app on your iPhone
Open the Watch app on your iPhone — it has a black icon with a white watch face. Tap the Battery tab at the bottom of the screen. You will see your Apple Watch's current battery percentage displayed as a large number, along with an estimate of how much time remains before the watch needs charging.
This is the most direct way to see your watch's battery level without picking up the watch itself. The percentage updates in real time as your watch drains power, so you can check it whenever you need to know how much charge remains.
If you have more than one Apple Watch paired to your iPhone, the Battery tab shows all of them. Tap the watch name at the top to switch between devices if you need to check a specific one.
Key Takeaways
- The Watch app's Battery tab on your iPhone displays your Apple Watch's current charge percentage and estimated time until the battery drains completely.
- You can check battery level without touching your watch, which is useful if the watch is across the room or already on the charger.
- If you own multiple Apple Watches, the Battery tab shows all paired devices and lets you switch between them to see each one's charge.
- The battery percentage updates automatically, so the number you see reflects the current state of your watch's power.
What the battery percentage means
The number shown in the Battery tab is the percentage of charge remaining in your Apple Watch's battery. A watch at 100% is fully charged. At 20%, you have roughly one-fifth of a full charge left. At 0%, the watch will not power on until you connect it to a charger.
The time estimate below the percentage — such as "About 2 hours remaining" — is a prediction based on your current usage patterns. If you are using power-intensive features like GPS or always-on display, the watch will drain faster than the estimate suggests. If you switch to a low-power mode or use the watch lightly, it may last longer.
Check battery in Control Center on your watch itself
If you have your Apple Watch with you, you can also see the battery percentage directly on the watch without opening your iPhone. Swipe down from the top of the watch face to open Control Center. The battery percentage appears in the upper right corner of the screen.
This method is faster if the watch is in your hand, but it requires the watch to have enough power to display the screen. Once the battery drops below a certain threshold, the watch may enter a low-power mode that limits features and shows only the time and battery percentage.
Understand low-power mode and critical battery warnings
When your Apple Watch battery drops to around 10%, the watch may enter Low Power Mode automatically. In this state, the watch disables background app refresh, reduces performance, and limits some features to extend battery life. You will see a red battery icon and a low-power warning on the watch face.
If the battery reaches 0%, the watch shuts down completely. You will not be able to use it, receive notifications, or track activity until you charge it. The Watch app on your iPhone will still show the battery percentage as 0% even after the watch is off, so you know it needs charging.
Some Apple Watch models also support Power Reserve mode, which you can enable manually before the battery dies. This mode turns off all features except the ability to display the time, which can extend the watch's runtime for several more hours if you need to tell time without other functions.
Troubleshoot if battery percentage does not update
If the battery percentage in the Watch app stays the same for hours or shows an incorrect number, the connection between your iPhone and watch may be out of sync. First, make sure your Apple Watch and iPhone are within Bluetooth range — usually within 30 feet of each other with no major obstacles between them.
If they are in range and the percentage still does not update, restart the Watch app on your iPhone. Close it completely by swiping up from the bottom of the screen (on older iPhones) or swiping down from the top right (on newer models), then open the Watch app again. If the problem continues, restart your iPhone and your Apple Watch by holding the side button on the watch until the power-off slider appears, then slide to power off.
Charge your watch when battery runs low
Apple Watch batteries are designed to last a full day of typical use, but the actual time depends on which model you own, how often you use power-intensive features, and your personal usage habits. Most people charge their watch overnight, the same way they charge their phone.
Use the magnetic charging cable that came with your watch. Place the watch face-up on the charger, and the magnet will snap into place. A lightning bolt icon appears on the watch screen when charging begins. A full charge typically takes 45 minutes to 2 hours depending on the model.
If your watch battery drains much faster than it used to, a background app may be using excessive power, or the battery itself may be aging. Check the Battery tab in the Watch app regularly to spot unusual drain patterns, and consider having the battery replaced by Apple if the watch is no longer holding a charge for a full day.
Frequently Asked Questions
Can I see my Apple Watch battery on my iPhone lock screen?
No, the lock screen does not show your watch's battery. You must open the Watch app and tap the Battery tab. Some iPhone models can show battery percentages for connected devices in the battery widget on the home screen, but this feature is not available for Apple Watch on all iPhone versions.
Why does my watch battery percentage jump from 20% to 0%?
Apple Watch batteries can drain unpredictably at very low levels, especially if the watch is cold or under heavy load. The percentage estimate becomes less accurate below 20%, so the watch may shut down sooner than the remaining time suggests. Charge your watch as soon as you see a low-battery warning to avoid losing power unexpectedly.
Does the Watch app show battery for a watch that is turned off?
Yes. The Watch app will display the last known battery percentage even if your watch is powered off. The number will not update until you turn the watch back on and it reconnects to your iPhone, so you may see an outdated percentage if the watch has been off for a while.
What is the difference between the battery percentage and the time remaining?
The percentage is the exact amount of charge left in the battery. The time remaining is an estimate of how long the watch will run at your current usage level. If you suddenly start using GPS or other power-heavy features, the watch will drain faster than the estimate predicted.