Why doesn’t my Cougar battery stay charged?

A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you’ve been leaving the doors slightly open and the dome lights on during the night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.

What do you do with my dead Cougar battery?

We recycle it! Nearly 100% of all lead-acid batteries are recyclable.

What’s the cost of DieHard batteries for Mercury Cougars?

Get affordable prices on Mercury Cougar batteries by using one of our limited-time battery deals. Plus, all DieHard car batteries come with a free replacement warranty and extra coverage with DieHard Assurance.

What is the average lifespan of a car battery?

A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.

What is the white, crusty substance accumulating on my Cougar’s battery post?

The white, crusty stuff that can accumulate around Cougar car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.

What do I do about corrosion on my Cougar car battery?

To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your Cougar owner’s manual for instructions on how to do so.

Who sells Cougar batteries near me?

You can shop for Cougar batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.

Car Batteries for 1986 Mercury Cougar

Get a New Mercury Battery

Get a Battery for Your Mercury Cougar

Don’t let a dead battery stop you. Shop replacement car batteries for your 1986 Mercury Cougar at Firestone Complete Auto Care.

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1986 Mercury Cougar Battery Replacement & Size

Researching battery replacements for your Mercury Cougar? Check the chart to find the right car battery size and cold cranking amps for your Cougar.

Battery	Engine	Warranty		Cold Cranking Amps
56-1	V8/5.0L	Replacement 24 months	Performance months	550
65-2	V8/5.0L	Replacement 36 months	Performance months	850
56-1	V6/3.8L	Replacement 24 months	Performance months	550
56-1	L4/2.3L	Replacement 24 months	Performance months	550

BATTERIES
V8/5.0L - Battery: 56-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 550
V8/5.0L - Battery: 65-2 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 850
V6/3.8L - Battery: 56-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 550
L4/2.3L - Battery: 56-1 - Warranty: Replacement 24 months, Performance months - Cold Cranking Amps: 550

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Shopping for Mercury Cougar Car Batteries

Sadly, your Mercury Cougar won't last forever. Neither will its battery. On average, auto batteries last anywhere from three to five years. Don’t get stranded by your Cougar’s car battery. Replace it regularly instead! Pay attention to clues that your battery is on its way out. A slow engine crank, an illuminated battery or check engine light, bloated battery case, corrosion-covered posts, and subpar electrical performance may all indicate that your battery is on its last leg.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With computerized testing we can see how much charge is left in your battery. Visit us for a complimentary battery check and, if necessary, a battery replacement to help keep your 1986 Mercury Cougar running! Car batteries are one of our many specialties! Our technicians are well-acquainted with Mercury’s service specs for Cougar battery CCAs and reserve capacity. Get help identifying the type and size of battery that fits your car perfectly, and schedule a weekday or weekend battery replacement service for your car.

Why Choose a DieHard Battery for Your Cougar?

We only want what’s best for your Mercury Cougar, which is why we carry just that. Your vehicle needs a reliable, durable and powerful battery in even the most extreme conditions. DieHard batteries go above and beyond using state-of-the-art advancements to fuel the growing power needs of new vehicles and their accessories. A DieHard battery isn't an ordinary car battery. It's extraordinary. Choose a DieHard battery for your Mercury Cougar and have the peace of mind that performance will be there when you're counting on it. That's the kind of battery we deliver.

Making Your Cougar’s New Battery Last

Have you recently had a fresh battery installed in your Mercury Cougar? Good thinking! Give your new car battery the best start with proper care. flipping the dome lights and headlights off when exiting the car, cutting back on unnecessary short trips, keeping your battery posts clean, and avoiding radio and electronic component use when the engine is off.

Commonly Asked Cougar Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a Cougar-specific battery question, stop by your nearest store. Our technicians have the answers.

Why doesn’t my Cougar battery stay charged? A battery that won't hold a charge is almost as good as dead. It may be getting old. Or, you’ve been leaving the doors slightly open and the dome lights on during the night. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and learn more about your battery's charge.
What do you do with my dead Cougar battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
What’s the cost of DieHard batteries for Mercury Cougars? Get affordable prices on Mercury Cougar batteries by using one of our limited-time battery deals. Plus, all DieHard car batteries come with a free replacement warranty and extra coverage with DieHard Assurance.
What is the average lifespan of a car battery? A car battery normally lasts three to five years, but this number can vary based on battery type, your driving habits, and battery maintenance.
What is the white, crusty substance accumulating on my Cougar’s battery post? The white, crusty stuff that can accumulate around Cougar car battery terminals is called corrosion. It is caused by a chemical reaction between the battery acid and the air, which creates a white, powdery substance that can build up on the terminals over time. Corrosion can interfere with the flow of electricity between the battery post and the car's electrical system, sometimes leading to poor electrical performance, difficulty starting, and even premature battery failure.
What do I do about corrosion on my Cougar car battery? To help extend the life of your battery, you should routinely inspect and clean the terminals using a baking soda and water mix, wire brush, and rag. Be sure to disconnect the battery cables before cleaning and check your Cougar owner’s manual for instructions on how to do so.
Who sells Cougar batteries near me? You can shop for Cougar batteries at your local Firestone Complete Auto Care, and our expert technicians will even handle the installation. Don’t have time to visit our store? Our Firestone Direct mobile vans can come to you for battery installations! Learn more about our mobile battery services.