Watch your watch
If you’ve paired an Apple Watch with your iPhone, the two devices may be in near-constant communication, depending on what apps you use. To save your iPhone battery life, make sure you’re actually using all the apps that you enthusiastically loaded onto the watch when you first strapped it on. If you never use that fitness tracker you installed on January 1, for example, you can delete it. Go to the Watch app on your phone, make sure the My Watch tab at the bottom is selected, and scroll down to the Installed on Apple Watch section. Tap the app you want to delete, then toggle off Show App on Apple Watch.
You can also delete Apple Watch apps directly on the watch itself. Go to the home screen, press on the app in question until the apps jiggle, and then press the X to delete.
Seek and destroy power hogs
If you want to know how to save battery life on your iPhone but aren’t sure which apps are using the most power, there’s an easy way to check. In Settings, select Battery and then scroll down to Battery Usage by App. You’ll see a list of the apps using the most battery, displayed in order from highest to lowest consumption. If you find any Apple juice hogs that you don’t really need, go ahead and delete those apps.
Is Mail using a disproportionate amount of your battery power? You may want to change how often you tell it to fetch new messages. You can do that by returning to Settings and clicking on Mail. Select Accounts and then Fetch New Data. From there, you can determine whether Mail automatically fetches new emails, or does it in longer intervals.
Turn off location services
Your phone’s location tracking feature comes in handy in certain situations, like if you’re using the Maps or Weather apps, or if you’re trying to find your lost iPhone. But it can be a privacy concern. And if apps are using Location Services, they’re constantly requesting GPS data from your phone, which taxes your battery. Thankfully, it’s super easy to turn off Location Services. In Settings, go to Privacy and Location Services. You can either toggle it off altogether or adjust permissions for each app individually.