Two different battery systems power the 2018 Hyundai Kona depending on the model: the gasoline/diesel Kona uses a conventional 12‑volt lead‑acid battery, while the Kona Electric relies on a large high‑voltage lithium‑ion traction battery around 64 kWh.
Overview of the 2018 Kona lineup
In 2018, Hyundai offered the Kona as a standard internal‑combustion engine (ICE) vehicle and as an electric variant. The two versions share the same exterior design but use fundamentally different energy storage systems. This article covers both so you know which battery type applies to your specific Kona.
Gasoline/Kona ICE: the 12‑volt battery
The conventional Kona uses a standard automotive 12‑volt battery to start the engine and power the car’s electronics. This is a traditional lead‑acid battery and is the same type found in most non‑electric cars. Knowing the basics helps with maintenance and replacement planning.
Key points about the 12‑volt battery in the 2018 Kona ICE:
- Battery type: conventional 12‑volt lead‑acid automotive battery (in most markets, this is the standard flooded type; some variants may use an absorbed glass mat—AGM—battery for better performance in extreme climates).
- Capacity and size: typical passenger‑car 12‑V batteries in compact SUVs like the Kona are in the 40–60 Ah range; exact capacity varies by market and trim.
- Replacement interval: electrophysical wear depends on climate and use, but most owners replace a 12‑V battery every 3–5 years on average.
- Maintenance notes: keep the terminals clean and tight, ensure the alternator is charging properly, and avoid parasitic draws when the car is parked for extended periods.
Conclusion: For the 2018 Kona ICE, you’re dealing with a conventional 12‑volt lead‑acid battery designed to power starting and accessories, not the propulsion system.
Kona Electric: the high‑voltage traction battery
The Kona Electric is powered by a large high‑voltage lithium‑ion battery pack that supplies energy to the electric motor. This is a different class of battery from the 12‑V starter battery and is designed for propulsion and long-range driving.
Key facts about the Kona Electric battery:
- Battery type: lithium‑ion high‑voltage battery (often using nickel manganese cobalt oxide chemistry, commonly referred to as NMC).
- Capacity: roughly 64 kWh (gross capacity; usable capacity is slightly lower in practice). This battery enables a EPA‑estimated range in the low‑ to mid‑260s miles depending on trims and conditions.
- Voltage and architecture: high‑voltage pack, typically in the 300–400 V range (nominal around 356 V in many Hyundai EVs of this era).
- Charging: supports DC fast charging (up to around 100 kW on early Kona Electric models) and AC charging via onboard charger (often around 7.2 kW). Charging speed varies by charger and vehicle software.
- Maintenance and service: the traction battery is not a user‑replaceable item in routine service; Hyundai provides warranties (commonly 8 years/100,000 miles in many regions) and dealers handle battery repairs or replacements under warranty.
Conclusion: The Kona Electric’s battery is a high‑voltage lithium‑ion traction pack, not a traditional 12‑V car battery. It’s designed for propulsion, with charging options and a dedicated warranty separate from the 12‑V system.
Maintenance and practical considerations
Whether you own a Kona ICE or Kona Electric, understanding the battery system helps with maintenance decisions and long‑term planning. The ICE’s 12‑V battery requires standard care and replacement at regular intervals. The Kona Electric’s traction battery benefits from proper charging habits, climate considerations, and warranty coverage that reflects its high‑voltage, high‑energy use.
Before you plan any battery work, consult your vehicle’s manual or a Hyundai service professional to confirm the exact specifications for your VIN and regional market, as there can be minor variations by country or model year.
Summary
The 2018 Hyundai Kona comes in two battery configurations. The gasoline/Kona ICE uses a conventional 12‑volt lead‑acid battery for starting and electronics, typically lasting several years with routine maintenance. The Kona Electric uses a high‑voltage lithium‑ion traction battery around 64 kWh to power the electric motor, with DC fast charging capabilities and a warranty that covers the high‑voltage pack for many years. In short: 12‑V for the standard Kona, and a 64 kWh lithium‑ion pack for the Kona Electric.
What size battery is in the Kona?
Depending on your mobility needs and performance wants, you can pick your power and preferred range: the 48.4 kWh battery with up to 377 km driving range. Or the 65.4 kWh version that delivers up to 514 km on a single charge.
How much is a replacement battery for a Hyundai Kona?
For the high‑voltage battery in a Hyundai Kona Electric, most U.S. estimates fall between $6,000 and $10,000 for parts and labor at a dealer, with some independent or refurbished options dipping closer to $5,000. The small 12‑volt battery is completely different and typically costs just $150–$300 installed.
What type of battery does a Hyundai Kona use?
The 2025 Hyundai Kona uses a 12-volt automotive battery; many models come standard with a lead-acid battery and some configurations may use AGM for enhanced performance. We stock OEM-specified batteries and can recommend the optimal type—standard flooded or AGM—based on your Kona's equipment and usage needs.
What type of batteries does Hyundai use?
Lithium-ion polymer battery
Lithium-ion polymer battery.
Hyundai's lithium-ion polymer batteries have a lower memory sensitivity and excellent charge efficiency compared to conventional batteries. Choose the size of your battery pack depending on your driving range needs.