1. Turn off system positioning
Sharing my location, location-based apple ads, wireless LAN network, nearby popular apps, HomeKit, these 5 system locations are useless, so I turned them off.
⏩Location: Settings>Privacy>Location Services>System Services
2. Remove the widget
Although the widget is a useful little trick,
However, the small plug-in operation steps are too cumbersome and will cause some unnecessary stalls. So about my small plug-ins, I only left a few useful ones, and deleted the others.
⏩Steps: Notification Center–Swipe right to see the widgets–then turn to the bottom–click Edit–you can delete the widgets that are not commonly used
3. Turn off the app location service
Some apps do not require positioning at all, and positioning does not have any subsidy effect. Apps such as music can turn off the positioning function.
⏩Location: Settings>Privacy>Location Services. Select the apps that you want to turn off location services, and change them to never or open during app use.
4. Disable siri
I like to use the Hey Siri feature, because sometimes, you can ask Siri to do a lot of things for me without turning on the phone.
But this function will consume some electricity, because the phone will always be in the listening state and will listen to the commands of Hey Siri.
Therefore, users who do not use the battery can choose to turn it off.
⏩Location: Settings–Siri and Search–Turn off the switch to listen to Hey Siri
5. Turn off background application refresh
This is Apple’s official recommendation.
⏩Location: Settings–General–Background application refresh
6. Close important places
⏩Location: Settings–Privacy–Location Services–System Services–Important Locations. Click in and close
Sean Lee 
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Iman iman 