Ipad mini 5 heating after 16.2 update

Higher than usual battery utilisation is expected to occur for some hours, or possibly days, after performing a system software update. After updating, many background housekeeping processes will be running - including reindexing the file system. Nominal battery utilisation can be expected to return within a few days.

If you are experiencing very high battery utilisation, a process may have stalled. A forced-restart will usually clear a stuck/stalled process. To restart your iPad:

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

Force restart iPad (models with the Home button)

Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.

If the problems persists, you might be well advised to seek assistance to seek from Apple Support - and request a remote diagnostic test. You can contact the Support Team using the Get Support link at top-right of this page. 

Alternatively, you can initiate and manage your support cases using the excellent Apple Support App. If not already installed on your iPad, the App can be downloaded from the App Store:

https://apps.apple.com/gb/app/apple-support/id1130498044

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to test and assess your iPad:

Genius Bar Reservation and Apple Support Options - Apple

Force restart your Ipad.