iPhone Duo battery life: How long it lasts and how to make it last longer
💡 Need to know
- Power your entire day: iPhone® Duo has up to 24 hours of battery life with typical use.
- Bigger screen, more energy: The larger inner display generally uses more power.
- Battery Health warns about issues: Open Settings and tap Battery Health to check your battery capacity.
- A charging limit prolongs the battery's lifespan: Your battery may last longer if you only charge it to 80% each time.
Your iPhone Duo has turned you into a multitasking machine. You've got social media open on one screen and your work email on the other. But before you know it, your battery has already dropped to 10%. Is that normal for a phone with two screens?
Asurion Experts help customers get the most out of their tech. Whether you're looking for ways to improve your iPhone battery life or wondering how to check your iPhone battery health, we've got plenty of tips. Here's what to expect from the iPhone Duo battery life and how to make it last longer.
How long the iPhone Duo battery lasts
Apple™ didn't only give the Duo two screens. It has a dual-battery design to match, so each side has a separate battery.
How long your Duo lasts per charge depends on how you use it. If you start at 100%, Apple says you can expect up to 24 hours of battery life with typical use of both screens. That could include everything from making FaceTime™ calls to using GPS to get to work.
If you're only watching videos, your battery might stretch longer. Here are a few estimates:
- Up to 44 hours of video playback when using the outer display and 31 with the inner display
- Up to 37 hours of streamed video using the outer display and 26 with the inner
What drains the iPhone Duo battery most
Certain settings and features can sneakily run down your Duo's battery, even when you're not using it. Watch out for these potential power drainers:
- The inner display is bigger than the outer one, so it may use more power.
- ProMotion increases your screen's refresh rate for smoother scrolling, which might consume more energy.
- The Always On display lets you see notifications on your lock screen without fully waking your phone.
- Turning up your screen's brightness typically uses more power.
- Siri® AI is always listening for "Hey Siri."
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How to check Battery Health and app usage
If it feels like you're reaching for your charger more frequently, a quick iPhone battery life check can help you figure out if your Duo is having issues.
Here's how to check your battery health:
- Open the Settings app.
- Tap Battery Health, which may list each battery separately.
- Check the Maximum Capacity to see your current iPhone battery capacity compared to when it was brand new.
You can also check how much battery each app uses by following these steps:
- Open Settings.
- Tap Battery.
- Scroll down until you see a list of recently used apps, then tap each one to see its battery usage.
How to make your iPhone Duo battery last longer
These iPhone battery life tips will help you get more out of every charge:
- Instead of using both screens, rely on the outer display for quick tasks like checking the time.
- Conserve energy by tapping Battery > Power Mode > Low Power Mode. For easier access, you can also add Low Power Mode to Control Center.
- Let your phone adjust its own battery use. In the Settings app, tap Battery > Power Mode. Then toggle Adaptive Power on.
- Switch off background activity by tapping Settings > General and toggling off Background App Refresh.
- Only charging your iPhone to 80% is better for its long-term health. In the Settings app, tap Battery > Charging and set a limit.
Normal drain or a software problem?
It's normal for your Duo to use more battery after you first set it up or after an update. However, keep an eye out for these potential signs your iPhone battery needs replacing:
- The battery suddenly drops with normal use.
- Your phone feels hot while you're using it.
- The phone randomly shuts down.
If these symptoms keep appearing, try running a battery check to see what's going on.
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FAQ
What kills your iPhone battery the most?
Background activity and high brightness can kill your Duo's battery faster. Heat is another common reason for battery drain.
Is it better to charge to 80% or 100% on an iPhone?
Apple recommends using Optimized Battery Charging, which may delay charging your battery past 80%. That can reduce wear on your battery.
How to make your iPhone battery lifespan longer?
Using Lower Power Mode may help your Duo's battery last longer. Turning down the phone's brightness is another helpful option.
How long should a 100% iPhone battery last?
With typical use, a Duo's battery could last up to 24 hours. If you're only using the outer display, you could get up to 44 hours of battery life.
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