Let Siri go
As smooth as its voice is, you might not use Siri that often, so why keep it running in the background, sipping on your battery life?
Do this: Give Siri a break by going to Settings, General, and then Siri’s tab. If you feel insecure about not having your mobile personal assistant on standby, at least disable the Raise to Speak function.
Ditch automatic date & time updates
Your iPhone is a thoughtful little creature which automatically changes your time settings according to the country you’re in, using Location Services. But if you leave the country only twice a year, is there really a need to keep this feature on? The answer is no.
Do this: You can activate the function when you get around to traveling. But if you’re in one country most of the time, head on over to Settings, General, Date & Time to make sure Set Automatically is turned off.
Stop repeated message notifications
Your iPhone can be quite a nag. When you don’t attend to a message immediately, your iPhone finds the need to light up the display to bring your attention to a Message received again, leaving your battery rather distressed from the repeated notifications.
Do this: To help your iPhone quit being a nag, go to Settings, Notification Centre, and find Messages in the Include list, Repeat Alerts and set it to Never. We appreciate the thought, but once is enough, thank you very much.
Keeping your iPhone on vibrate mode is one of the biggest strains on your battery life, and it's often unnecessary when it's in your hands or in plain sight.
Do this: Disable vibration alerts by going to Settings, Sounds and then turning off both Vibrate on Ring and Vibrate on Silent.
Are you sharing files over AirDrop and Bluetooth 24/7? No? Then there's no need to keep both these features on and needlessly sipping away on your battery.
Do this: Deactivate AirDrop and Bluetooth by swiping up on your phone to bring up the Control Centre and making sure the Bluetooth and AirDrop symbols are not highlighted anymore.
Quit sending feedback to Apple
Yes, doing this helps Apple churn out timely updates for smoother working systems, but it's all at the expense of your battery life, because your iPhone is sending daily usage reports back to Apple HQ. It's fine when your iPhone is fully charged, but if it’s on the brink of flatlining, be less philanthropic.
Do this: You can disable reporting by going to Settings, General, About, Diagnostics and Usage to activate Don’t Send mode. Feel free to switch it back to Automatically Send when you have more battery life to spare.