Dim the screen brightness
Keeping your smartphone on full brightness might look great, but it will quickly eat away at your battery life. Many phones also include an auto-brightness feature to automatically adjust to lighting levels - look in your Display Settings to change this.
Keep the screen timeout short
This should be in your phone Display Settings menu, or, on an iPhone, look for Auto-Lock in the General Settings menu. We recommend changing this to the minimum available time.
Turn off Bluetooth and Wi-Fi
If these aren't needed, for example when you're not in your car or away from your home or office Wi-Fi connection - look for 'Connectivity' or similar in your Settings menu.
Limit application access to GPS
GPS can significantly drain your battery life, so we recommend that you revoke permissions for any apps that don't necessarily require it. This should be in your Application Settings.
Don't leave apps running in the background
Whilst multitasking can be helpful, it also drains your battery life. Android users can tap Settings > Apps > Running and hit 'Stop' on the apps you wish to close. iOS users can double tap the Home button then hold the icon until an X appears to close each app.
Turn off vibrate alerts
Vibrate alerts can be handy as a subtle notification compared to a ringtone, but use much more battery - consider instead turning your phone to 'Silent' mode and leaving it somewhere visible so that you don't miss calls or texts.
Consider turning off push email and other push notifications
Push notifications can drain your battery by connecting to the internet and searching constantly for new information. By changing your settings to search for emails or other data at timed intervals, or manually, you should see a vast battery life improvement.
Turn off your phone from time to time
Many of us leave our smartphones on for weeks on end, but you may see a slight battery life improvement by turning it off every now and then, rather than just leaving it in sleep mode.