Li-ion polymer

Hyundai/Kia 1.6T Plug-in Hybrid 360V 13.8 kWh Lithium-ion Polymer Battery

The Hyundai/Kia 1.6T Plug-in Hybrid 360V 13.8 kWh Lithium-ion Polymer Battery is the high voltage battery in the Hyundai Tucson Plug-in Hybrid (2022-2026), Hyundai Santa Fe Plug-in Hybrid (2022-2023), Kia Sorento Plug-in Hybrid (2022-2026) and more.

At a Glance

Li-ion polymer chemistry
360 volts nominal
liquid cooled

Specifications

Chemistry	Li-ion polymer
Cell format	pouch
Nominal voltage	360 V
Capacity	38.3 Ah
Energy	13.8 kWh
Cooling	liquid (water) cooling with individual battery cooling system
Location	under the floor
Weight	140 kg

Cars That Use It

Hyundai Tucson Plug-in Hybrid 2022-2026 NX4 Run the checklist
Hyundai Santa Fe Plug-in Hybrid 2022-2023 TM; 13.8 kWh, 360V, 38.3 Ah per product briefing Run the checklist
Kia Sorento Plug-in Hybrid 2022-2026 MQ4; Kia lists 360V, 38 Ah, 14 kWh, 309 lb (2022-2024) / 322 lb (2025-2026) Run the checklist
Kia Sportage Plug-in Hybrid 2023-2026 NQ5; Kia 360V, 38.3 Ah, 13.8 kWh, 88 kW, 140.0 kg Run the checklist

What Goes Wrong

Reported failures, each from a source listed below, as of October 7, 2026.

Owner complaints NHTSA lists under the Hybrid Propulsion System component for the Hyundai Santa Fe Plug-In Hybrid, Hyundai Tucson Plug-In Hybrid, Kia Sportage Phev, by model year: 2022: 1 · 2022: 1 · 2023: 1. These are all hybrid system complaints, owner reported and unverified, not only battery faults, as of 2026-10-07.

Warranty

Hyundai's 2022 Owner's Handbook lists the Hybrid, Plug-in Hybrid and Electric Vehicle System, including the high-voltage battery, at 10 years/100,000 miles with repairs restoring at least 70% of capacity, and 10 years/150,000 miles for the 2022 Tucson and Santa Fe Plug-in Hybrid batteries when certified TZEV and sold in the listed states; later years and the Kia Sorento and Sportage plug-in hybrids were not confirmed from a booklet. (hyundaiusa.com: 2022_Owners_Handbook_Warranty.pdf, 2026-10-07)

How battery warranties work.

Get This Pack Tested

Do not open it yourself. The pack can hurt you with the car switched off.

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Sources

Last updated October 7, 2026. Failure and recall notes are as of that date. Spotted a mistake, or speaking for a maker? Report an error.

Hybrid Battery Test is independent. It is not affiliated with, sponsored by or endorsed by Hyundai, Kia. Names and part numbers are used only to identify the vehicle and the part.