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: Wide Sunroof Assembly
Components and components location Components Location 1. Wide sunroof assembly Repair procedures Removal • To remove the panorama sunroof assembly, use the tools shown in the following figure: [Tools Composition] ① Square wire ② Insert-type wire grip [Tool Assembly] • Insert and affix square wire ① into the insert hole of the wire grip ②.Battery saver function The purpose of this feature is to prevent the battery from being discharged if the lights are left in the ON position. The system automatically shuts off the parking lights 30 seconds after the ignition key is removed and the driver’s door is opened and closed. With this feature, the parking lights will turn off automatically if the driver parks on the side of the road at night and opens the driver’s side door.