Apple Watch Battery Settings to Change

To get the most out of your Apple Watch battery, you should change a handful of settings: disable Background App Refresh, turn off the always-on display, and enable Reduce Motion. These three adjustments alone can extend your battery life by several hours, depending on your usage. Below, we explain exactly where to find these settings, what they do, and which ones are worth changing for your specific needs.

Background: Why Apple Watch Battery Drains Fast

The Apple Watch battery is small—typically around 200–300 mAh depending on the model—yet it powers a bright display, an accelerometer, a heart-rate sensor, a GPS chip, and a Wi-Fi/Bluetooth radio. Apple rates most models for 18 hours of mixed use, but real-world usage often falls short. The biggest drains are the screen (especially with always-on enabled), continuous heart-rate monitoring, and apps refreshing in the background. Understanding these components helps you decide which settings to change without sacrificing the features you actually use.

How to Change the Most Impactful Battery Settings

Here are the settings that have the largest effect on battery life, in order of impact. You can find all of them in the Watch app on your iPhone or directly in the Settings app on the watch itself.

• Always-On Display — Go to Settings > Display & Brightness > Always On, and toggle it off. This alone can save 10–15% of battery per day, because the screen is the single biggest power consumer. If you don’t want to lose the glanceable time, consider enabling “Wake on Wrist Raise” (which is on by default) so the screen lights up when you lift your wrist.
• Background App Refresh — Go to Settings > General > Background App Refresh and turn it off entirely, or selectively disable it for apps you don’t need updating in the background (like news apps or weather). This prevents apps from fetching data when you’re not using them, which can save 5–10% per day.
• Reduce Motion — Go to Settings > Accessibility > Motion > Reduce Motion and turn it on. This disables the parallax effect and some animations, which reduces GPU load. It’s a minor saving (2–5%) but adds up over a full day.
• Wake on Wrist Raise — If you don’t need the screen to turn on every time you raise your wrist, disable this in Settings > Display & Brightness. You can still tap the screen or press the Digital Crown to wake it. This saves battery if you tend to gesture a lot.
• Location Services — Go to Settings > Privacy > Location Services and set apps to “While Using” instead of “Always” for apps that don’t need constant location (like weather or maps). GPS is a major drain, especially during workouts.

Workout and Heart Rate Settings That Matter

Workouts are a common battery killer. If you exercise regularly, consider these tweaks:

• Use Power Saving Mode during workouts — In Settings > Workout, enable Power Saving Mode. This disables the always-on heart-rate sensor and GPS, but it uses the accelerometer to estimate calories. You’ll lose precise heart-rate data but gain significant battery life.
• Turn off heart-rate notifications — Go to Settings > Heart and disable “High Heart Rate Notifications” if you don’t need them. The sensor still samples periodically, but notifications cause extra processing.
• Disable blood oxygen and temperature sensing — On newer models, you can turn off these sensors in the Health app or on the watch itself, but they only run periodically, so the savings are minimal. Not worth changing unless you’re desperate.

Other Settings That Help (But Less Obvious)

These settings have a smaller impact but can still help:

• Reduce brightness — Go to Settings > Display & Brightness and lower the slider. The default is usually 50–70%; dropping to 30–40% saves a few percent per day.
• Disable Siri’s “Listen for Hey Siri” — In Settings > Siri, turn off “Listen for Hey Siri” if you rarely use voice commands. The microphone is always listening, which uses a small amount of power.
• Turn off Wi-Fi when not needed — The watch automatically joins known Wi-Fi networks, but if you’re away from home, you can disable Wi-Fi in Control Center (swipe up on the watch face). It will still use Bluetooth for phone connection.
• Use a simple watch face — Watch faces with lots of complications (like weather, calendar, and heart rate) update frequently, draining battery. A simple analog face with just the time uses less power.

Common Misconceptions and Mistakes

Many users believe that closing apps from the app switcher saves battery. On the Apple Watch, this is false—swiping apps away forces them to reload from scratch, which uses more power than leaving them in memory. Another mistake is leaving Bluetooth off; the watch uses Bluetooth for most phone communication, and turning it off forces the watch to use Wi-Fi, which consumes more power. Also, don’t confuse “Power Reserve” mode with the settings above—Power Reserve (accessed by holding the side button) turns the watch into a basic time-only display and is meant for emergencies, not daily use.

When to Use Low Power Mode vs. Individual Settings

Apple introduced a dedicated Low Power Mode in watchOS 9. It’s a one-tap solution that disables Always-On Display, background heart-rate measurements, and some notifications, and it can double the battery life. You can turn it on in Control Center (swipe up and tap the battery icon). However, it also disables features like fall detection and irregular rhythm notifications, so it’s best for short periods when you know you won’t need those. For daily use, changing the individual settings above gives you more control—you can keep the features you need while saving battery.

Comparing Battery Life Across Models

The exact savings from these settings vary by model. The Apple Watch Ultra has a much larger battery (around 542 mAh) and can last up to 36 hours on a normal charge, so the settings above matter less. The Series 8 and SE (both around 300 mAh) benefit the most from these changes. If you have an older model like the Series 4 or 5, the battery has degraded over time, so the settings will make a more noticeable difference. In general, expect a 20–40% improvement in battery life after applying the top three settings, depending on your usage patterns.

Frequently Asked Questions

Will turning off Always-On Display really save that much battery? Yes, the display is the biggest power consumer. On models with an OLED screen, turning it off completely (or using the “Wake on Wrist Raise” feature) can save 10–15% of battery per day. If you’re used to glancing at your wrist, you’ll adapt to raising your wrist instead.

Does Background App Refresh actually matter? It does, but less than you might think. Apple designed it to be efficient, but apps like weather or news that update frequently can drain 5–10% per day. Disabling it for non-essential apps is a safe way to save power without losing functionality.

Should I use Low Power Mode all the time? No, because it disables important health features like fall detection and irregular heart rhythm notifications. Use it only when you need to stretch battery life for a long day or a trip, and turn it off when you’re back to normal.

Is it bad to charge my Apple Watch overnight? Modern lithium-ion batteries are fine with overnight charging. The watch stops charging at 100% and runs on power from the charger, so leaving it on the charger overnight won’t damage the battery. However, avoid letting it drain to 0% regularly, as deep discharges can shorten battery lifespan.

Do complications drain battery? Yes, especially ones that update frequently, like weather, heart rate, or stock prices. Each complication can refresh every 15 minutes, using both processing and network. If battery life is a priority, use a watch face with fewer complications.

Can I change these settings from the iPhone Watch app? Yes, most settings are mirrored in the Watch app on your iPhone. Go to the Watch app, tap on your watch name, and then navigate to Display & Brightness, General, etc. This is often easier than navigating on the small screen.

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