Contents:

The battery is in the trunk under the compartment cover.
When replacing the battery, disconnect the negative (-) cable (1) and remove the positive (+) battery fuse box (2).
Remove the battery mounting bracket (3).
WARNING - Touching metal surfaces in the trunk under the compartment cover

Do not touch metal surfaces in the trunk under the compartment cover while the engine is operating or hot. Doing so could result in serious personal injury. Turn the engine off and wait until it cools down or wear gloves to replace the battery from the luggage room.
Your vehicle has a maintenance-free, calcium-based battery.
When recharging the battery, observe the following precautions:
Reset items
Items should be reset after the battery has been discharged or the battery has been disconnected.
Kia Stinger (CK) 2018-2023 Owner's Manual: Integrated HomeLink® Wireless Control System
The HomeLink® Wireless Control System provides a convenient way to replace up to three hand-held radiofrequency (RF) transmitters with a single built-in device. This innovative feature will learn the radio frequency codes of most current transmitters to operate devices such as gate operators, garage door openers, entry door locks, security systems, even home lighting.Kia Stinger (CK) 2018-2023 Owner's Manual: Driveshaft and axle
Special service tools Special Service Tools Tool Name / Number Illustration Description 09495-3K000 Band installer Installation of ear type boot band 09495-39100 Band installer Installation of hook type boot band 09231-H1100 Bar 09500-11000 Bar 09432-3D900 Front differential carrier side bearing race installer Installation of the side bearing race.