If the battery on your iPhone is excessively draining overnight on a regular basis, the problem might be due to certain settings on your device.
iPhone Battery Draining Overnight Issue
It is normal for iPhone to lose some battery life (upto 10%) overnight and this figure can go up a bit more, if your device was busy downloading updates.
However, if your iPhone is draining over 20 to 25% battery life overnight on a regular basis, it indicates a problem with the battery and it could simply be due to certain settings on your device.
Even if you have an old iPhone with a reasonably good battery, you should be able to extend its overnight battery life and also its day-time battery life by following the steps below.
1. Enable Low Power Mode
An easy way to prevent iPhone from draining its battery overnight is to manually switch your device to Low Power Mode.
Go to Settings > Battery > enable Low Power Mode by moving the slider to ON Position.
Low Power Mode saves battery life by disabling all non-essential services on iPhone and allowing only Calls and Messages to run on your device.
2. Enable Airplane Mode
Another easy way to prevent iPhone from using up its Battery overnight is to switch ON Airplane Mode.
Open Settings > enable Airplane Mode by moving the toggle to ON position.
Airplane Mode disables all incoming Calls and Messages on your device. Hence, make sure that you remember to disable Airplane Mode as soon as you get up in the morning.
3. Disable Bluetooth
You can extend the Battery Life on your iPhone by keeping Bluetooth switched OFF at night and also when you are not using it during the day time.
Go to Settings > Bluetooth > disable Bluetooth by moving the toggle to OFF position.
At any time, you can enable Bluetooth by moving the toggle to ON position.
4. Turn OFF AirDrop
The AirDrop feature on iPhone uses Battery life by constantly scanning for AirDrop-Enabled devices in its surroundings.
Go to Settings > General > AirDrop > On the next screen, select Receiving OFF option.
Whenever required, you can enable AirDrop by selecting “Everyone” or “Contacts Only” options.
5. Disable Background App Refresh
Many Apps on iPhone have a tendency to constantly refresh data in the background, which uses up Battery Life.
Go to Settings > General > Background App Refresh > Disable Background App Refresh for Unnecessary Apps by moving the toggle to OFF position.
Note: You can disable background app referesh for all Apps at once by going to Settings > General > Background App Refresh > tapping on Background App Refresh tab and selecting the None option.
6. Leave iPhone Facing Downwards
Keeping iPhone facing downwards at night saves battery life by preventng your device from lighting up its bright display, whenever it recieved a notification.
However, make sure that you do not place your iPhone Face-down on a rough or dusty place, even if it is protected by a screen protector.
7. Enable Auto-Brightness
You can significantly improve the Battery Life of iPhone by turning down brightness to the lowest possible level and enabling Auto-Brightness.
Go to Settings > Display & Brightness > use the slider to adjust Brightness to the lowest possible level.
You can also Enable Auto-Brightness and see if it really suites you.
8. Set iPhone to Auto-lock on Timeout
Setting up iPhone to turn OFF its screen automatically after a set period of inactivity helps in improving Battery Life.
Go to Settings > Display & Brightness > Auto-Lock > set Auto-Lock interval to 1 Minute.
9. Install Updates
It is possible that Apple has pushed an Update to fix Battery drain issues.
Go to Settings > General > Software Update > On the next screen, tap on Download and Install (If an update is available).
Patiently wait for the iOS update to be download on your device. Once the download is complete, install the update by tapping on Install Now option.
10. Check Battery Health
Apple has made it easy for iPhone users to check the state of battery.
Go to Settings > Battery > Battery Health & Charing > On the next screen, you will be able to see the Maximum and Peak Charging Capacity of the Battery.
If the Battery is degraded, you will see a Battery Message with a Service Options link that takes you to Apple’s support page.