iOS 9.3 comes with many new features. However several iPhone and iPad users seem to suffering with a fast draining battery problem after the iOS 9.3 update.
Here are a few simple fixes to keep iOS 9.3 last much longer.
1-Background App Refresh
Background App Fresh lets apps run in the background thus may drain battery more quickly. You may want to disable this iOS feature. Go to Settings > General > Background App Refresh and turn this off.
2-Reset Your Device
Note that this does not erase any data. Simple press and hold the home and the off/on buttons together until you see the Apple logo.
3-Low Power Mode
You may want to enable Low Power Mode. Tap Settings > Battery and disable Low Power Mode.
4-Some apps may use lots of battery power.
Try to identify your apps that kill your battery. To do this, go to Settings > Battery. This will show you which of your apps are the biggest battery drainers. You may want to remove these apps and find an alternative or you may limit your use.
You may want to reduce your screen brightness to save battery. Go to Settings > Display & Brightness
Parallax is an accessibility feature. This feature may drain your battery. Thus you may want to disable it by going to Settings > General > Accessibility > Reduce Motion and turn this on.
7-Turn Fetch and Push Notifications Off
Go to Settings > Mail, Contacts, and Calendars > Fetch New Data and turn this off by selecting ‘Manually’. Then go to Settings > Notifications and turn Notifications off for your apps you do not want.
8-Disable Automatic Updates
This feature will update your apps in the background. You may want to disable it by going to Settings > iTunes and App Store and turn off ‘Updates (‘Automatic Downloads’ section).
9-Set Auto Lock
Set Auto Lock to one minute by going to Settings > General > Auto-Lock
Disable the followings when/if you are not using them
1-Disable Wi-Fi (Settings > Wi-Fi)
2-Disable Bluetooth (Settings > Bluetooth)
3-Disable Location Services (Settings > Privacy > Location Services)
4-Turn off Fitness Tracking (Settings > Privacy > Motion and Fitness)
5-Disable iCloud Keychain (Settings > iCloud > Keychain)