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: Side Impact Sensor (SIS)
Description and operation Description • Side Impact Sensor (SIS) system consists of two Pressure Side Impact Sensor (P-SIS) installed at each center of the front door module (LH and RH), two SIS installed at each center pillar nearby (LH and RH) and two rear SIS installed in the rear pillar (LH and RH). • Pressure Side Impact Sensor is also called P-SIS because it detects pressure from collision at its mounting location.Kia Stinger (CK) 2018-2023 Owner's Manual: Emergency Call (eCall) Button
Components and components location Component Repair procedures Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the overhead console lamp. (Refer to Lighting System - "Overhead Console Lamp") 3. Disconnect the overhead console lamp connector (A).