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: Oil Pan
Repair procedures Removal 1. Remove the engine room front under cover and side cover. (Refer to Engine and Transmission Assembly - "Engine Room Under Cover") 2. Drain the engine oil. (Refer to Lubrication System - "Engine Oil") 3. Remove the engine mounting support bracket nut (A).Kia Stinger (CK) 2018-2023 Owner's Manual: Seat Ventilation Unit
Components and components location Component Location 1. Seat ventilation blower 2. Seat ventilation unit (Assist seat only) Schematic diagrams Circuit Diagram Repair procedures Removal Seat Ventilation Unit 1. Disconnect the negative (-) battery terminal.