Don't neglect updates
Updates contain bug fixes which can include improvements in efficiency, which in turn use up less battery. We know it can be a pain to constantly update apps, but it's worth it in the long run.
Do this: Make sure you get on those update as soon as possible, instead of leaving them languishing in a lonely forgotten corner of the App Store.
Your iPhone is a thorough searcher by default, with Spotlight Search going through everything on your phone to find what you want. If it’s Angry Birds you’re looking for, is it really necessary to look through Videos, Music, and Reminders? No, it's not, so do your iPhone a favour.
Do this: Fine tune your search boundaries to get faster results and lessen the strain on your battery life. Click on Settings, General, then Spotlight Search to uncheck the categories which you know are definitely not going to turn up the results you're after.
Put those emails to sleep
Most people (us included) can’t live without having emails pushed directly to their inboxes in real-time. But when your iPhone’s perpetually searching for new emails, it's going to hit your battery.
Do this: Fetch your email manually instead of having your iPhone push it. To do this, click on Settings, then Mail, Contacts, Calendars, and Fetch New Data. Make sure Push is off and you can either set an interval for your phone to Fetch your new emails or do it Manually, so that new email is only Fetched when you bring the app up.
Or you could just, you know, not check your email outside of office hours. Easier said than done though.
iPhones need rest too
Those who choose Never on their Auto-Lock settings are wasting precious battery life. If you're not interacting with your iPhone, then there are very few reasons for its screen to remain on.
Do this: Go to Settings, then General, and finally to Auto-Lock. Choose the shortest time possible (one minute) which should be more than enough for most people.
Kill pesky ads
Who doesn’t hate ads? iOS 9 has a built-in Advertising feature to help you stop advertisers from serving you targeted ads and slurping up your battery life along the way.
Do this: Make sure you’re one step ahead of mindless ads by clicking on Settings, then Privacy, and scrolling all the way to the bottom to the Advertising tab. Swipe the tab to the right to Limit Ad Tracking and resume browsing independence.
Geotag no more
We know it’s fun to keep track of all the places you’ve been in your life, but is it really necessary? You’d be surprised at how Location Services has been activated for apps that don’t really need it. Leaving Location Services on, even when you’re walking to catch a bus, is a waste of limited battery life. You don’t really want everyone to be able to keep tabs on your whereabouts anyway, do you?
Do this: Do a clean-up by going to Settings, then Privacy, Location Services and turn off everything to only activate Location Services when you need them, like geotagging a photo at a certain spot, or when you’re about to head off on a run. Otherwise, you can customise the apps which have Location Services because apps like WhatsApp and your local banking ones don't really need the function enabled.