The 2019 Kia Optima uses different battery setups depending on the powertrain: gasoline-only models rely on a conventional 12-volt lead-acid battery for starting and accessories, while Hybrid and Plug-in Hybrid variants use a high-voltage lithium-ion polymer traction battery to power the electric motor. Here's how it breaks down across the lineup.
Battery configurations by powertrain
The 2019 Optima was offered in gasoline-only and hybrid forms, with a plug-in hybrid option available in some markets. The following outlines the battery types used across these variants.
- Gasoline-only Optima: A conventional 12-volt lead-acid battery provides starting power and powers the car’s electronics when the engine is off.
- Optima Hybrid: A high-voltage lithium-ion polymer traction battery powers the electric motor portion of the hybrid system, with an energy capacity around 1.6 kilowatt-hours (kWh).
- Optima Plug-In Hybrid: A larger high-voltage lithium-ion polymer battery around 9.8 kWh enables a meaningful electric-only range, in addition to the gasoline engine; it can be charged via plug-in charging.
Across all variants, the standard 12-volt battery remains essential for starting the vehicle and running standard electrical systems, while the high-voltage packs handle hybrid propulsion and, in the plug-in version, extended electric driving.
Maintenance and safety considerations
Owners should understand how to care for each battery type and the safety considerations that come with high-voltage systems.
- 12-volt battery health: The gasoline Optima relies on a traditional 12-volt battery. If the engine is slow to crank or electronics dim, test the 12-volt battery’s voltage (healthy systems typically show about 12.6–12.8 volts when the car is off). Replace as needed.
- Hybrid battery safety: The high-voltage traction battery in Hybrid and Plug-in Hybrid models is not user-serviceable. Do not attempt to service or remove high-voltage components yourself; consult a qualified technician if you notice reduced electric assist, unusual noises, or diminished EV range.
- Plug-in battery considerations: For the Plug-In Hybrid, ensure proper charging using the dedicated charger and charging cable. If you cannot charge, you can still operate the vehicle on gasoline power, but electric-only range will be reduced.
- General precautions: Keep battery terminals clean and dry, avoid short-circuit risks, and follow the owner’s manual regarding warranty and service intervals for each battery type.
When in doubt or if you notice symptoms like persistent charging errors, shown warning lights, or abnormal performance, contact a Kia dealer or an authorized service center for a diagnostic.
Summary
The 2019 Kia Optima uses a classic 12-volt lead-acid battery for gasoline-only models, while Hybrid and Plug-in Hybrid versions employ high-voltage lithium-ion polymer packs (about 1.6 kWh for the Hybrid and about 9.8 kWh for the Plug-in Hybrid) to power the electric drive. The 12-volt battery remains essential for starting and basic electronics across all models. Regular checks of the 12-volt system and professional handling of the high-voltage traction battery are advised for ongoing reliability and safety.
What battery does a Kia Optima use?
DieHard Platinum AGM – Battery : H6 Group Size, 760 CCA, 950 CA, 120 Minute Reserve Capacity (Part No. H6-AGM)
What kind of battery does a 2019 Kia Optima need?
Kia also decided to change the battery on the 2.4-liter equipped Kia Optimas for the 2019 and 2020 model years to a DH6. So how are these DH6 and DH7 batteries a dramatic change from the previous batteries? Size, weight and reserve capacity.
Is an Optima battery AGM or Lithium?
OPTIMA Batteries have been around for quite a while, but OPTIMA's all-new ORANGETOP batteries are a relatively new addition to our product offerings. All OPTIMA ORANGETOP batteries use lithium technology, instead of lead-acid based AGM technology that you would find in OPTIMA REDTOP, YELLOWTOP or BLUETOP batteries.
Are Kia batteries AGM?
Absorbent Glass Mat (AGM) batteries are maintenance free and have the AGM battery serviced by a professional workshop. Kia recommends that you visit an authorised Kia dealer/service partner.