Crazy Battery Drain on a two week old iPhone 13 Pro Max.

Hello Ayat1,

​Thank you for using the Apple Support Communities. As we understand it, you're finding your battery life is shorter than expected, and you've already tried restoring the device and had it inspected at a service provider. Is that right? We'd like to share a suggestion that might help get to the bottom of this.

Under Settings > Battery, what do you see for usage? Are any apps showing messages about "Background Activity" or "No Cell Coverage and Low Signal?" These details might help to work out more about what's happening: About the battery usage on your iPhone, iPad, and iPod touch

Let us know what you find, and take care.

You can see in this article how to save the battery life :

Tips for iPhone, iPad, and iPod touch

Update to the latest software.

Always make sure your device is using the latest version of iOS.

• If you are using iOS 5 or later, see if you need an update. Go to Settings > General > Software Update.
• If an update is available, you can plug your device into a power source and update wirelessly or plug it into your computer and update with the latest version of iTunes.

Learn more about updating iOS

Optimize your settings.

There are two simple ways you can preserve battery life — no matter how you use your device: adjust your screen brightness and use Wi‑Fi.

Dim the screen or turn on Auto-Brightness to extend battery life.

• To dim, open Control Center and drag the Brightness slider to the bottom.
• Auto-Brightness adjusts your screen to lighting conditions automatically. To activate it, go to Settings > Accessibility. Tap Display & Text Size, then turn on Auto-Brightness.

When you use your device to access data, a Wi‑Fi connection uses less power than a cellular network — so keep Wi‑Fi on at all times. To turn on Wi‑Fi, go to Settings > Wi‑Fi to access a Wi‑Fi network.

Enable Low Power Mode.

Introduced with iOS 9, Low Power Mode is an easy way to extend the battery life of your iPhone when it starts to get low. Your iPhone lets you know when your battery level goes down to 20%, and again at 10%, and lets you turn on Low Power Mode with one tap. Or you can enable it by going to Settings > Battery. Low Power Mode reduces display brightness, optimizes device performance, and minimizes system animations. Apps including Mail will not download content in the background, and features like AirDrop, iCloud sync, and Continuity will be disabled. You can still use key functions like making and receiving phone calls, email, and messages, accessing the Internet, and more. And when your phone charges up again, Low Power Mode automatically switches off.

View Battery Usage information

With iOS, you can easily manage your device’s battery life, because you can see the proportion of your battery used by each app (unless the device is charging). To view your usage, go to Settings > Battery.

Here are the messages you may see listed below the apps you’ve been using:

Background Activity. This indicates that the battery was used by the app while it was in the background — that is, while you were using another app.

• To improve battery life, you can turn off the feature that allows apps to refresh in the background. Go to Settings > General > Background App Refresh and select Wi-Fi, Wi-Fi & Cellular Data, or Off to turn off Background App Refresh entirely.
• If the Mail app lists Background Activity, you can choose to fetch data manually or increase the fetch interval. Go to Settings > Accounts & Passwords > Fetch New Data.

Location and Background Location. This indicates that the app is using location services.

• You can optimize your battery life by turning off Location Services for the app. Turn off in Settings > Privacy > Location Services.
• In Location Services, you can see each app listed with its permission setting. Apps that recently used location services have an indicator next to the on/off switch.

Home & Lock Screen. This indicates that the Home screen or Lock screen was displayed on your device. For example, the display was awakened by pressing the Home button or by a notification.

• If an app frequently wakes your display with notifications, you can turn off push notifications for the app in Settings > Notifications. Tap the app and set Allow Notifications to Off.

No Cell Coverage and Low Signal. This indicates either that you are in a poor cell coverage area and your iOS device is searching for a better signal or that you’ve used your device in low-signal conditions, which has affected your battery life.

• You can optimize your battery life by turning on Airplane mode. Open Control Center and tap the Airplane mode icon. Note that you cannot make or receive calls while in Airplane mode.

Plug in and power on your computer to charge your device.

Make sure your computer is plugged in and powered on when you’re using it to charge your iOS device via USB. If your device is connected to a computer that’s turned off or is in sleep or standby mode, your device’s battery may drain. Note that iPhone 3G and iPhone 3GS cannot be charged with a FireWire power adapter or FireWire-based car charger.

Take care!

Ayat1 wrote:

Hi Ryane77,

Thanks so much for getting back to me. I don’t see ANYTHING under battery usage. My husband thought that too, that the battery may be falling because of low signal and cell coverage but that is not the case because the battery continues to fall even if the phone is on airplane mode. Secondly, the battery usage graph shows no apps using the battery. As I’ve circled the portion in the screenshot I posted above, the battery fell overnight, from 100% at 1am to 45% at 8am!! No apps can be seen in the graph that were using the battery. Mobile Data and Wifi were off as well. I don’t know what to do, this is a brand new phone why is this happening 😢😭😭!

If the phone is new or has been recently completely restored to factory state, it will take a couple of days before the apps start showing up under Battery usage.

You should be charging the phone overnight, by the way.

When to charge your iPhone or iPad - Apple Community

Hi there !

thank you for contact the apple support community.

I want ask you if you update you iPhone Lately

and if the answer is yes, did you have the same problem before the update?

Im looking for your reply !

THANK YOU FOR YOUR REPLY, I ADVISE YOU TO GO TO THE NEAREST APPLE DEALER TO INSPECT THE BATTERY AND IF IT HAS A MANUFACTURING DEFECT, IT WILL BE REPLACED.

Hi how is it now? Whether you replaced it? Because me too facing the same issue but apple support says there is no issue in your software or hardware. I dont know what to do!