Your vehicle has a maintenance-free, calcium-based battery.
WARNING - Recharging battery
When recharging the battery, observe the following precautions:
Kia Cee'd JD Service Manual: Heater & A/C Control Unit (DATC) Repair procedures
Self Diagnosis
1.
Self-diagnosis process
2.
How to read self-diagnostic code
After the display the panel blinks three times every 0.5 second, the
corresponding fault code blinks on the setup temperature display pan ...
Kia Cee'd JD Service Manual: Battery Description and operation
Description
1.
The MF(Maintenance Free) battery is, as the name implies, totally maintenance
free and has no removable battery cell caps.
2.
The MF(Maintenance Free) battery does not require water replenishment
for the repair.
...