The answer depends on the model and drivetrain: gasoline and non-plug-in hybrids use a standard 12‑volt starting battery, while the Tucson Hybrid and Tucson PHEV use high‑voltage traction batteries with different capacities. In short, you’ll have a 12V battery on most gas and non-plug-in hybrids, plus a small high‑voltage pack for hybrids and a larger high‑voltage pack for plug‑in hybrids.
Gasoline-powered Hyundai Tucson: 12‑volt starter battery
Most Tucson models with a conventional gasoline engine carry a standard 12‑volt starter battery. This battery powers all the electronics and starts the engine. The exact size can vary by model year and trim, so it’s best to verify on the battery label or in the owner's manual.
- Battery type: 12‑volt lead‑acid, commonly an absorbing glass mat (AGM) or flooded type depending on the configuration.
- Capacity and power: roughly 60–70 ampere‑hours (Ah) and 550–750 cold‑cranking amps (CCA) for many SUV applications; Hyundai may specify a value suited to the Tucson’s electronics load.
- Group size: various group sizes (such as 48, 47, or 49) are used across different model years; the exact size is printed on the battery label.
- Replacement guidance: replaced by a qualified technician; ensure the replacement matches Hyundai’s specifications for the vehicle.
- Location: normally mounted under the hood, on the driver’s side or near the front of the engine bay.
Before listing the typical characteristics of the 12‑volt battery used in many Tucsons, note that exact specifications can vary by year and trim.
Because the precise 12‑V battery size can change with model year and trim, always check the battery label or your owner’s manual when purchasing a replacement.
Tucson Hybrid: high‑voltage traction battery
The Tucson Hybrid uses a high‑voltage traction battery to power the electric motor and assist the gasoline engine. This is separate from the 12‑V battery and is not a user‑serviceable item in routine maintenance.
Battery specifications
- Capacity: about 1.5 kilowatt‑hours (kWh) of energy storage.
- Type: high‑voltage lithium‑ion polymer battery.
- Voltage: around 270–300 volts (high‑voltage system).
- Service: not intended for user servicing; replacement is handled by Hyundai dealerships or authorized repair shops.
- Location: integrated into the vehicle’s underbody/floor area in many hybrid layouts; not accessible like a 12‑V battery.
Before listing the specifications, note that they pertain to the standard Hyundai Tucson Hybrid configuration and may vary slightly by year.
For hybrid repairs or battery issues, contact a Hyundai service center. The high‑voltage pack has a different warranty and service cycle than the 12‑V battery.
Tucson PHEV: larger high‑voltage plug‑in battery
The plug‑in Tucson (PHEV) carries a larger high‑voltage battery that allows extended electric‑only driving. This is a separate system from the 12‑V battery and is not user‑serviceable in routine maintenance.
Battery specifications
- Capacity: about 13.8 kilowatt‑hours (kWh).
- Type: high‑voltage lithium‑ion polymer battery.
- Voltage: roughly 350–360 volts.
- Electric range: EPA estimates vary by year and trim, typically in the mid‑20s miles on electric power alone, with combined operation extending range through hybrid aids.
- Location: mounted within the vehicle’s underfloor area or cargo floor; not accessible like a conventional 12‑V battery.
Before outlining the specs, note that numbers can vary by model year and regional market.
Like all high‑voltage packs, the PHEV battery is serviced or replaced only by trained technicians at a Hyundai dealer or authorized service center.
Care, maintenance and replacement considerations
Regardless of drivetrain, follow manufacturer guidelines for inspection intervals and replacement. The 12‑V battery generally requires attention every few years depending on climate and usage, while high‑voltage traction packs are designed for long life but are covered under separate warranty terms and are typically replaced only when performance degrades or in the event of failure.
Summary
In summary, the Hyundai Tucson uses a traditional 12‑V battery for most gasoline and non‑plug‑in variants, typically around 60–70 Ah with 550–750 CCA, and the exact group size varies by year. The Tucson Hybrid uses a small high‑voltage traction battery of about 1.5 kWh, while the Tucson PHEV uses a larger 13.8 kWh high‑voltage pack for extended electric driving. Always refer to the specific year and trim manual or your battery label to confirm exact specifications and replacement requirements.