What kind of battery is in a 2017 Ford Focus?
The 2017 Ford Focus uses a 12-volt automotive battery (lead-acid).
Most trims rely on a conventional flooded lead-acid battery, but if your Focus is equipped with Auto Start-Stop, Ford typically specifies an Absorbed Glass Mat (AGM) battery to cope with frequent cycling. Exact type and size depend on engine, trim, and market, so check the label on your battery or the owner's manual for precise specifications.
Battery chemistry and start-stop considerations
Understanding the two main battery types helps explain what you might find under the hood. All are 12-volt systems that power starting and electrical systems, but AGM batteries perform better under repeated discharges and cranking when idle stops are frequent, which is why they are favored for Stop-Start operation.
- Conventional flooded lead-acid batteries are the most common choice for Focus models without Auto Start-Stop. They are reliable and economical, but may have shorter cycle life under frequent stop-start conditions.
- Absorbed Glass Mat (AGM) batteries are used on models with Auto Start-Stop to tolerate repeated cycling and provide consistent performance when the engine restarts.
- Both types are 12-volt systems, but the internal construction and performance characteristics differ, affecting replacement considerations and warranty terms.
In practice, most 2017 Foci without Start-Stop use a conventional battery, while those with Auto Start-Stop are more likely to use an AGM unit. Always verify with the vehicle's battery label or by checking Ford's official specifications for your exact market and trim.
How to identify the exact battery for your vehicle
To ensure you buy the correct replacement, look up the battery's official specifications for your exact car. The following steps help confirm the right type and size.
- Read the battery label on the top or side of the unit to find the group size, cold-cranking amps (CCA), and reserve capacity. These details determine fit and performance.
- Consult the owner's manual or Ford's online parts catalog by entering year, model, and engine to locate the recommended battery type and capacity.
- Use your vehicle identification number (VIN) when shopping at a dealer or auto parts store to confirm whether an AGM or conventional flooded battery is required for your car's configuration.
- When replacing, dispose of the old battery according to local regulations and consider recycling options offered by the retailer.
Having the correct battery type ensures optimal start-up reliability, especially in extreme temperatures and if your Focus includes optional electrical gear.
Summary
The 2017 Ford Focus runs on a 12-volt lead-acid battery. Most models use a conventional flooded battery, but cars with Auto Start-Stop may require an AGM battery to handle repeated restarts. Verify the exact type and size by checking the battery label, the owner's manual, or Ford's specifications for your trim and market.
