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: Battery sensor
Description and operation Description For various control units installed on the vehicle to function based on the signals from various sensors, stable power supply is essential. ECM controls generating voltage by duty cycle based on the signals on voltage, current and temperature of battery from battery sensor mounted to negative (-) battery terminal.Kia Stinger (CK) 2018-2023 Owner's Manual: Steering Column & Shaft
Components and components location Components 1. Steering column module (SCM) 2. Steering column module (SCM) bracket Specifications Specification Item Specifications Rated Voltage DC 12 V Operating Voltage Range DC 9 - 16 V Operating Temperature Range -30°C ~ +75°C Storage Temperature Range -40°C ~ +85°C Dark Current Max.