In general, the 2019 Ford Fusion uses two different battery setups depending on the model: gasoline-only variants rely on a traditional 12-volt lead-acid battery, while the Fusion Energi plug-in hybrid uses a high-voltage lithium-ion battery pack for electric driving, along with a separate 12-volt auxiliary battery for accessories.
The 2019 Fusion lineup includes both conventional gasoline models and a plug-in hybrid option. The type of battery you encounter depends on whether your car is a standard gas Fusion or the Energi variant. This article explains the two primary configurations and how they function within the vehicle’s electrical system.
Battery configurations in the 2019 Ford Fusion
Gasoline-only Fusion
Overview of the standard 12-volt battery used in non-hybrid models.
- Type: 12-volt lead-acid battery powering the starting system and vehicle electronics.
- Construction: Most trims use a traditional flooded 12-volt battery; higher trims or vehicles with certain features may use an Absorbent Glass Mat (AGM) design to support start-stop technology and heavier electrical loads.
- Role: Provides power for ignition, lighting, infotainment, and other electrical systems; it is not used to drive the vehicle’s propulsion.
In gasoline-only Fusions, the 12-volt battery is the workhorse for routine electrical needs, with the alternator recharging it as the engine runs.
Fusion Energi plug-in hybrid
Overview of the high-voltage battery that enables electric drive in the Energi model.
- Battery type: High-voltage lithium-ion (Li-ion) battery pack used to store energy for electric propulsion.
- Capacity: About 7.6 kilowatt-hours (kWh) of usable energy, enabling all-electric driving for a portion of typical trips.
- Voltage and charging: The pack operates at a nominal high voltage (roughly around 240 volts) and is charged via Level 1 (120V) or Level 2 (240V) charging, as well as regenerative braking.
- Auxiliary battery: A separate 12-volt battery powers accessories and conventional electronics.
The Fusion Energi’s primary energy storage is the high-voltage Li-ion pack, which distinguishes it from the gasoline-only model and supports its plug-in hybrid operation.
Summary
Bottom line: A 2019 Fusion Energi uses a high-voltage lithium-ion traction battery (about 7.6 kWh) for electric propulsion, while the gasoline-only Fusion relies on a conventional 12-volt lead-acid battery for starting and auxiliary systems. Both models also include a 12-volt auxiliary battery to support electronics.