One thing that Apple has worked on a lot recently is the performance of the battery in the various models of iPhone. Battery Life, which is the amount of time that your device is running before it’s in need of a recharge, as well as Battery Lifespan, which is how long your battery lasts until it needs to be replaced, have improved greatly.
There are, however, steps that we can take as end-users to improve both of these metrics and prolong the life of our devices. Let’s be honest, they aren’t cheap and if you aren’t worried about upgrading every single year then eeking out some extra battery life is always a good thing.
With the (mini) heat-wave we’ve just enjoyed in the UK, I was curious as to what happens to my phone when left in direct sunlight. Quick research pointed out that the optimum temperature for your phone is 16º-22º C (62º-72º F), although it’s still designed to perform well between 0º and 35º, so on this side of the pond, this isn’t too much of a problem. If it does go over 35º, you may find that you permanently damage your battery capacity. Also, if you charge your device at a high ambient temperature, this can damage the battery further.
On the note of temperature, be mindful of the case that your iPhone is in. The case may act as an insulator and warm your phone up whilst charging. If you notice your phone getting excessively hot whilst charging, make a point of removing it from its case beforehand.
With the majority of iOS updates, there are tweaks designed to improve battery life and reduce energy consumption. If practical, try to keep up-to-date with the latest version of iOS. This also has security benefits too.
Reducing the brightness of your screen can make a tremendous difference to the battery life. I have mine set to Auto Brightness and (so far) have never felt the need to increase the level manually, even in brightly lit areas.
There are two main points to note with Wi-Fi. Firstly, if you are out and about with no plans to join a Wi-Fi network, then turn it off. If Wi-Fi is enabled then your phone will poll for new networks at regular intervals, reducing the amount of charge you have on your phone for this cycle. Switch it off until you know you need it.
To that end, not many people know that if you have a choice between using your data connection and using Wi-Fi to access data, Wi-Fi actually uses less power, so always opt for that where possible (and secure).
Do all of your apps need to be polling in the background for new information? Go to Settings -> General -> Background App Refresh and you’ll see a list of applications with toggles next to each. Turn off the ones that aren’t needed. If you’re feeling daring, turn them all off with one switch at the top of the screen.
Lots of applications try to enable Location Services by default, however, I’d say there is only a handful where this is truly useful. To see your applications that have this enabled, go to Settings -> Privacy -> Location Services. Turn off those that aren’t needed.
View Battery Usage Information
If you go to Settings -> Battery, you can see a list of applications that have been in use over the last 24 hours, or 7 days, listed in order of battery consumption (highest to lowest). From here, you can see the culprits that need tweaking, although be mindful of the fact that the percentage is not an exact science, it’s just relative to the total amount of battery used. If you don’t have a battery problem, then the percentage is OK. For more information, click the clock icon to see some facts relating to exact amount of time on screen as well as background activity to ascertain whether you need to take action.
I hope that helps. Any other advice for readers, please feel free to post in the comments