The 2019 Highlander uses two different battery configurations depending on the powertrain: gasoline-only models rely on a conventional 12‑volt lead‑acid battery for starting and accessories, while the Highlander Hybrid uses a high‑voltage nickel‑metal hydride (NiMH) traction battery to power the electric motors alongside a standard 12‑volt system.
Battery configurations in the 2019 Highlander
Below is a concise breakdown of the two battery configurations you’ll encounter in the 2019 Highlander lineup.
- Gasoline-only Highlander: A conventional 12-volt lead-acid battery sits in the engine bay to start the engine and run accessories. This battery is user-serviceable and typically needs replacement every 3–5 years depending on climate and use.
- Highlander Hybrid: A high-voltage traction battery pack, usually nickel-metal hydride (NiMH), provides propulsion for the electric motor and stores energy from regenerative braking. The vehicle also maintains a 12-volt battery for accessories, with power managed by a DC-DC converter from the hybrid system. The NiMH pack is sealed and serviced only by qualified technicians.
These two configurations cover the main battery setups for 2019 Highlanders. Lithium-ion traction packs were not used in the US market Highlander Hybrid for 2019.
Maintenance and safety considerations
Handling and maintenance differ between the two systems. The 12-volt battery requires standard care—keep terminals clean, check charge, and replace as needed. The high-voltage NiMH traction battery is a sealed component that requires specialized service; never attempt to open or service it yourself. If you notice hybrid-specific symptoms (unusual warning lights, reduced electric assist, or abnormal engine behavior), have a Toyota technician diagnose the system.
Summary
In summary, a 2019 Toyota Highlander uses a traditional 12-volt lead-acid battery for gasoline-only models and a high-voltage NiMH traction battery for the Hybrid variant, with a separate 12-volt system powering electronics in both. The two systems work together to deliver starting power, vehicle electronics, and hybrid propulsion where applicable.