The rapid drain on the iPhone battery is a consequence of the simultaneous launch of a large number of services and functions, some of which are almost never used by the user. To extend the battery life of your iPhone, you need to deactivate certain functions of the device through the Settings menu.
Wi-Fi and Bluetooth
Traditionally, most of the charging on Apple devices and phones from other companies is consumed by Wi-Fi and Bluetooth modules, which, even when not in use, consume a large amount of battery power. The wireless internet functions should be turned off when you are not using them on your phone at the moment, and only started when you need to make a wireless connection. To turn off Bluetooth and Wi-Fi, swipe up from the bottom of the screen. In the control panel that appears, click on the Wi-Fi and Bluetooth icons, which are located in the 2nd and 3rd places on the left. Deactivated options are displayed in black and activated ones in white.
Data transmission 3G and 4G
The built-in internet module for cellular network also consumes a lot of battery power. To save battery, temporarily turn off the Internet on your device through the "Settings" - "Cellular" menu. Disable the Cellular Data and Enable 3G (4G) sliders.
You can reactivate this option if you want to access the Internet using the SIM.
Notifications
Some programs installed on iPhone use Action Center to send messages to the user. Thus, applications use the Internet channel and remain in the device's RAM in order to periodically send the necessary information about updates or new events in the program. Go to "Settings" - "Notification Center" and disable the programs from which you do not want to receive information. In the "Notification Center" you can also remove banners that run on the locked screen of your phone.
Other options
Siri Assistant requires a constant Internet connection and takes up a significant amount of the device's resources, and therefore you can turn it off through the menu "Settings" - "General" - Siri, if you are not using it. Turning off Siri can significantly save battery power. You can also disable the effect of moving wallpaper in iOS 7, which also consumes the resources of the device. The required option is in the menu "Settings" - "General" - "Accessibility" - "Reduce movement".
Auto brightness adjustment ("Wallpaper and brightness" - "Auto brightness") is a useful option and allows you to save some energy, and therefore, to increase the life of the iPhone without recharging, you can activate this option.
Disabling automatic updates of information about weather, promotions, news, etc. will help reduce battery consumption. through "Settings" - "General" - "Disable content". Reducing the screen dimming time will also significantly save the battery (item "General" - "Auto-lock" settings). Deactivation of location determination ("Privacy" - "Geolocation") will be able to extend the operation of the device. You can also turn off iCloud if you are not using this cloud service. If necessary, you can also turn off notifications of the mail program ("Data download" in the "Mail, Addresses, Calendars" menu).
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