Every mobile device has an integrated GPS, which is very useful. It helps us find unknown locations, restaurants and etc. However, it consumes a lot of energy and the battery will be drained in no time.
Unfortunately, many people forget to turn it off after they are done using it, and it works in the background.
Turn down the screen brightness (Dim the display)
The higher the brightness level is, the faster the battery drains. This means that if you dim the display you will prolong the battery's duration, and minimize the effects of the "battery draining quickly" issue. Every OS (operating system) offers manual adjustment of brightness level and it can be done in a pretty easy way.
Most of the recent Android smartphones, like the Galaxy S6, Nexus 6 and HTC One M9 and others, have battery saving modes that can extend the life of your device, even if you’re already under 20%. Battery saver performs various operations with one goal, to save energy. It does that by limiting vibrations, location services and background data.
To enable it go to Settings -> Battery saver (Power management) -> Find power saving mode (enable the slider)
iOS also offers a setting called Low power mode which is an easy way to extend the battery life of your mobile device when it starts to get low.
To enable it, go to Settings -> Battery -> Tap to enable the Low power mode
Remove unnecessary home screen widgets and live wallpaper
Even though they're "sitting" in the home screen, seemingly inactive, they're consuming power. This refers to widgets that show status updates in the background, as well as the ones that just "sit" there but look pretty and animated (animated live wallpaper).
Remove all the widgets from the home screen that you don't (want to) use and avoid setting a live wallpaper.
To remove a widget from the home screen:
Press and hold the widget you want to remove -> drag it to the small thrash can or the "X" sign (on the top or on the bottom).
To change the live wallpaper:
Press and hold anywhere on the home screen until it gets smaller (or go to Settings -> Display - Wallpaper) -> tap on Wallpaper -> select one of the default wallpapers or add one by yourself.
Update the applications installed in your mobile device
Applications often get updated to use less battery power, so you should make sure your apps are up to date. Even if you configured the phone to download updates automatically, some applications might still require your manual intervention to install updates.