1. Disable location and background app refresh for Facebook
The Facebook app for iPhone consumes a huge amount of memory and processing power, even when you’re not using it. Turning off background app refresh can actually cause your battery percentage to increase.
2. Disable background app refresh for apps you don’t care about
Background App Refresh was a feature added in iOS 7, to allow apps to check for new content and download updates even when they’re not running. However, it can use up a lot of power, and you don’t necessarily need it running for every app that supports it.
3. Stop quitting your apps in multitasking
A lot of people tell you that closing your apps will save your battery life because it keeps the apps from running in the background. However, this can actually make your battery life worse if you do it on a regular basis. Closing the app, removes it from the phone’s RAM, so when you open it again your device has to load it back into memory again. The truth is, apps in your multitasking menu are not running in the background at all: iOS freezes them where you last left the app. Unless you have enabled Background App Refresh, most of your apps are not allowed to run in the background.
4. Disable push email temporarily
Push email allows your device to receive instant notifications every time you get an email. It is great if you need to know when every single email comes in, but does impact battery if configured incorrectly. Try changing the setting to fetch emails every hour, thirty minutes, or fifteen minutes and see if the drain stops. You could also trying disabling Push on individual accounts if you have multiple.
5. Disable push notifications for annoying apps
Every time you get a push notification, your phone wakes from sleep for 5 to 10 seconds to light up your screen and wait for your potential action upon each notification. If you receive 50 notifications during the day and never act on them, that will add 4 to 8 minutes to your Usage time.
6. Turn off battery percentage
People that are anxious about their iOS device battery life are constantly checking it to see the percentage and how much it has dropped from the last time they checked it. So if you check your device twice as much, simply to check on the battery life, you are essentially halving the time your device will last.
7. Enable airplane mode in areas of poor cellular service
When the iPhone detects that you are in a place of low signal, it will increase the power to the antenna in order to stay connected enough to receive calls and maintain a data connection. This will destroy your battery life if you are constantly in a location with one bar or no service at all.If you still need to receive calls there is nothing you can do, but if your service is so poor that you can’t receive calls anyway, turn on Airplane mode. You can then turn Wi-fi back on if you need to.
8. Go to an Apple retail store
Apple has rolled out a new ‘Extended Battery Life Test’ for all iOS technicians that allows them to see a detailed report of battery usage on your device. If your physical battery is defective, the technicians can replace it for free if your iOS device is under warranty.