One of the easiest ways to resolve battery drain issue is to clear device cache. Cache is the temporary data that apps download so that they don't have to download that data every time. It is different from App data, read the difference here.
Although this is good and important, clearing cache resolves many device issues such as the battery. However, Google has removed the option to clear cache in Oreo, because it wants to handle the clear cache mechanism itself. But, it still exists in MIUI 9. And, helps in fixing battery drain issue too.
So, to clear cache on your device, follow these steps:
Step 1: Open Settings on your phone and tap on the Storage option.
Step 2: Under Storage, wait for your device to finish calculating space and data. Then tap on the Cached data option. You will get a notification asking you to confirm whether you want to clear cached data for all apps. Tap OK.
3. Find the Culprit Third-party App
Many times, it’s not the MIUI software that is responsible for battery drain issue. The issue could be because of some third-party app as well.
To find the culprit app responsible for battery drain on MIUI 9, follow these steps:
Step 1: Open Settings on your phone and tap on the Battery option.
Step 2: Then, tap on the Power option followed by Battery use.
Step 3: Here, you will find all the apps that are using your battery in the decreasing order of their usage. Meaning, the app draining most of your battery juice will be on the top. If you find an app that you rarely use on the top, that particular app is responsible for battery drain.
We would suggest clearing the cache and app data for that particular app from the individual Storage settings of that app (Settings >Installed apps>App>Storage>Clear cache and Clear data). If that doesn’t resolve the issue, you could also try uninstalling the app for some time.
4. Uninstall Rarely Used Apps
Rarely used apps could also affect your phone's battery. Look at the installed apps on your Redmi device. Uninstall all the apps that you rarely use.
To uninstall an app, hold the app icon on the home screen. A delete icon will appear at the top. Drag the app icon in it to uninstall the app.
5. Disable Wake Lock Screen for Notifications
Every time you get a notification, the lock screen will light up. This could be helpful for many but it also drains your phone’s battery. So, we would suggest you to turn this feature off.
To do so, open Settings on your phone and tap on the Lock screen & password option. Then turn off the toggle for the Wake lock screen for notifications option.
Step 1: Open Settings on your phone and tap the Additional settings option. Then scroll down and hit Backup & reset.
Step 2: Under Backup & reset, tap Factory data reset. Then tap the Reset phone option at the bottom.
Hopefully, you should have solved the battery drain issue on your Redmi device. It's time to check some tips and tricks of MIUI 9, read them here. If you need any help regarding MIUI 9, drop us a message.
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