Late last year, Facebook was confronted by software experts and technology journalists over its mobile app which appeared to run processes in the background that ate away at valuable battery life.
The tech company acknowledged the problem and promised to resolve it by rejigging its mobile app.
"We found a few key issues and have identified additional improvements, some of which are in the version of the app that was released today," explained Facebook’s Ari Grant at the time.
Despite this, it still appears you can save battery by deleting the app altogether.Thankfully you don’t need to remove the standalone Facebook Messenger as well – so chat fans can rest easy.
If you can’t bear to part with Facebook’s app – admittedly one of the most popular apps on the App Store – there are other ways to save juice.
Dim your display
One of the biggest energy suckers is the iPhone's colourful display. Most smartphones will automatically adapt the brightness according to ambient light levels. To save even more energy it's worth popping into the settings to manually change the brightness to the lowest level.
Reduce the screen timeout time
While you're at it you can also change the settings so the screen turns off more quickly after you put the phone down. Look for an option called "screen timeout" in an Android phone or auto-lock in an iPhone and you can then tweak how long the screen stays on - set it to the shortest possible time.
Close apps you aren't using
Apple iPhones will let you multi-task with apps - so you can be composing a tweet but then quickly pop into your internet browser to find a link - and you won't lose the original post. The problem is, this means you can easily leave many apps running in the background, consuming precious battery life.
To combat this, close down any apps you aren't using. On an iPhone this means double tapping the home button and swiping icons upwards.
Turn off your wi-fi
When you're out and about your phone will constantly be searching for wi-fi networks to connect to, which can zap the battery life. It's worth switching the wi-fi off when you’re on the move and only turning it back on when you reach your destination.
Don't use vibrate mode
The power needed to run the vibration motor of your phone is far greater than the power needed for a ringtone. So if you’re trying to make your battery last longer it’s best to turn off the vibrate mode. If you’re trying to be discreet in a meeting or at work, then it’s worth just switching to silent.
Even if you do all of the above, you're still not going to get the battery life you were accustomed to in the 1990s. If you can't handle that, it might be worth taking the extreme nostalgia option...
Go back to the Nokia 3210
The Nokia 3210 is the greatest phone ever made. It might not have done any of the snazzy non-phone things that modern devices do - fitness tracking, altitude sensing, eye-testing fandangery - but it was great at sending texts, making calls, having a long battery life and not smashing even when you threw it across a room in a supermodel-esque rage.