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Turn off vibrations
Try not to use vibrations as much as you can because it also drains the battery.
To turn off vibrations:
Press the volume button to turn down the ringer, and you will see a menu pop up at the top of your screen. Here, you can either turn off all notifications for a custom period of time, or only receive priority notifications (based on your personal preferences). Either one will end up having a positive effect on battery.
Settings -> Sounds -> Switch off Vibrate on ring
Disable the feature Vibrate on touch (Android: Settings -> Sound -> Other sounds) as well, because it is completely unnecessary and it only drains your battery.
Most of the applications you install, notify you about everything, which is annoying. The only relevant notifications are the system notifications, which notify you about important system updates, and social-network notifications (Facebook, Twittter and etc).
Luckily, there is a way to disable these annoying notifications:
Go to Settings -> Sound & notification (or just Notifications) -> App notifications (varies from one device manufacturer to another) -> move the toggle (if any). The video tutorial below was taken on a Samsung Galaxy device, running on Android OS 8.
Go to Settings -> Notifications -> Tap on an app and on the toggle next to Allow Notifications. Turn off notifications for all but your most important apps.
From there you can block notifications for individual applications entirely, or set priority filters for receiving fewer notifications, which results in more battery life and fewer disturbances.
Please note that the system notifications should not be disabled, because they are important for the proper work of your mobile device.
Your phone’s biggest battery drainer is the display. You want your display off whenever you’re not looking at the screen, which is a good thing. However, the problem is that you often leave your device's display on, even when you’re done using it.
The best solution is a low screen timeout. Set your device to turn off its display after just one minute of inactivity and you can save almost a whole hour of wasted screen time per day.
Settings -> Display ->Sleep -> pick one of the offered options
Bluetooth is a short-range wireless technology that allows your mobile device to connect with other devices. The Bluetooth feature enables you to send and receive files, connect your devices to your car's sound system, use a bluetooth speaker or headphone and etc. Also, the bluetooh feature is one of the "battery drainers".
We tend to quit the applications we aren’t using as it seems as a logical way to stop them draining the battery. However, this isn't such a good idea after all.
When you close an application, you remove it from the RAM memory. This means that when you open it again, the mobile device has to load it back into memory. All of that loading and unloading drains your battery.
Applications don't drain the battery when you don't use them. They are not allowed to run in the background unless they are playing music, using location services, recording audio, or checking for incoming VOIP calls (like Skype). All of these exceptions, but the latter (Skype), will put an icon next to your battery icon to alert you that it is running in the background.
If your battery drains quickly and nothing else worked, you can activate the good old Airplane mode when you don't need your mobile device. It will disable all the major functions of the smartphone (e.g. the calls), but you will extend the battery's life until you plug it in to a charger.
Close unnecessary applications (mobile device)
If you use programs that require more effort of your CPU, your CPU will use more power and your battery will drain faster. Run only the applications you need the most so that the CPU doesn't use too much power, and select programs which don't demand too much of the CPU. The less your mobile device has to process, the more power it will save.
Every operating system offers a utility which allows you to check what is draining your battery.
To check what is draining your battery:
Android: Settings -> Power management -> Battery usage (or Settings -> Battery) -> Scroll down to see the list of applications
iOS: Settings -> General -> Usage -> Battery usage -> Scroll down to see the list of all applications
Auto-sync feature allows you to synchronize your mobile device with your online accounts (Viber, Skype, Outlook, Yahoo, Gmail and etc.) so that you can easily check for new emails and update your contacts list. Your device checks for new email and contact-list updates even if it is in standby mode, thus draining your battery.
The best solution is to turn this feature off.
Settings -> Accounts -> Tap on the three vertically-aligned dots and uncheck Auto-sync data
iOS you can disable the Auto-sync feature only in iTunes:
iTunes -> Preferences -> Devices -> Tick Prevent iPods, iPhones and iPads from syncing automatically
To turn the iCloud feature off (iOS devices only) go to Settings > iCloud -> tap to turn off iCloud features.
Your mobile device can automatically update its time depending on where you are in the world. A small amount of battery power is used because the mobile device determines the correct time via Location Services .
To turn off the automatic time zone feature:
Settings -> Date and time -> Turn off Automatic time zone
Settings -> General -> Date & Time -> move the slider next to Set Automatically to OFF.