Q: My iPad battery keeps draining and screen won't turn off unless I turn the iPad off completely (since the latest update installed). Any ideas?

Hello there, rdh4.

It sounds like your auto-lock feature is not working on your iPad since you updated to the latest version of iOS 9. The following link from the online iPad User Guide provides where to find and set this feature:

Sleep/Wake button - iPad User Guide

Lock iPad. Press the Sleep/Wake button.

If you don’t touch the screen for two minutes, iPad locks itself. You can change how long iPad waits to lock itself, or set a passcode to unlock iPad.

Set the auto-lock time. Go to Settings > General > Auto-Lock.

Additionally, you can look into battery usage and see what application may be causing your battery to diminish by reviewing this article:

About the battery usage on your iPhone, iPad, and iPod touch

Check battery usage 

Go to Settings > Battery. 

To see how long each app has been open and onscreen, and running in the background, tap . Under each app, you might see these usage types:

• Background Activity means that your battery is used while apps run in the background.
• Audio means that apps play audio while running in the background.
• No Cell Coverage and Low Signal means that your device is searching for a signal or being used with a low signal.
• Backup & Restore indicates that your device has been backing up to iCloud or restoring from an iCloud backup.
• Location and Background Location means that your battery was used when tracking your device.

 

Adjust settings to improve battery life

While viewing your battery usage, you might get a suggestion like Enable Auto-Brightness or Adjust Display Brightness. This is because iOS determined that changing these settings could improve your battery life. You can also see the usage times since the last full charge.

Use Low Power Mode

If you want to extend your battery life, turn on low power mode. This reduces power consumption until you turn it off or charge your iPhone to 80%. When low power mode is on, certain settings and features like mail fetch, Hey Siri, Background App Refresh, and some visual effects are reduced or disabled.

Learn more about low power mode.

Thanks for reaching out to Apple Support Communities.

Kind Regards.