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: Fuel Line
Repair procedures Removal Low Pressure Fuel Line [Engine Room <-> Extension Fuel Line] 1. Release the residual pressure in fuel line. (Refer to the Fuel Delivery System - "Release Residual Pressure in Fuel Line") 2. Switch "OFF" the ignition and disconnect the negative (-) battery terminal.Kia Stinger (CK) 2018-2023 Owner's Manual: SRS components and functions
The SRS consists of the following components: 1. Driver's front air bag module 2. Passenger's front air bag module 3. Side air bag modules 4. Curtain air bag modules 5. Retractor pre-tensioner assemblies 6. Air bag warning light 7. SRS control module (SRSCM) / Rollover sensor 8. Front impact sensors 9. Side impact sensors 10. PASSENGER AIR BAG “OFF” indicator (Front passenger’s seat only) 11.