Why won't my Cougar battery stay charged?

A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a free battery test at your nearest Firestone Complete Auto Care and learn more about your battery's charge.

What happens to my old Cougar battery?

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

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

Mercury Cougar batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes 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, flaky stuff that can build up around your Cougar’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your Cougar, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

How do I remove corrosion from my Cougar car battery?

Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.

Where can I find a battery for my Cougar?

When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install Cougar batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.

Car Batteries for 1984 Mercury Cougar

Get a New Mercury Battery

Get a Battery for Your Mercury Cougar

Don't let a failing battery slow you down. Shop replacement batteries for 1984 Mercury Cougars today and schedule a quick installation at Firestone Complete Auto Care.

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The Right Battery Size for a 1984 Mercury Cougar

Not sure what battery to get for your Mercury Cougar? Use this chart to find the right battery size and CCAs for your Mercury Cougar.

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

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

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Buying a Replacement Battery for Mercury Cougar

You can pretty much drive your Mercury Cougar until you don't want to anymore. But your Cougar's battery? Don't count on it to last forever. The average car battery lasts three to five years. Check your battery regularly and replace it as needed so it doesn’t leave you and your Mercury Cougar stranded. Watch for signs that your current battery is getting too old or too weak. A sluggish engine start, an illuminated check engine light or battery signal, bloated battery case, corroded battery terminals, or dim headlights can all be signs that your battery is waving goodbye.

Or, you can get a complimentary battery check at your nearest Firestone Complete Auto Care. With computerized testing we can see how much charge is left in your battery. Drop in for a free battery check and, if necessary, a battery replacement to help keep your 1984 Mercury Cougar running! Automotive batteries are just one of our many areas of expertise. Our expert technicians understand Mercury service recommendations for Cougar battery CCAs and reserve capacity. Get help choosing the battery size that matches your vehicle, and schedule a weekday or weekend battery replacement service for your car.

Is There a DieHard Battery for Cougars?

Your Mercury Cougar deserves the best, which is why we carry just that. You need a reliable, durable and powerful battery in even the most extreme conditions. DieHard Cougar batteries surpass expectations using the latest innovative technology to satisfy the increasing power needs of new vehicles. They're no ordinary battery, they're extraordinary. Go with a DieHard battery for your Cougar and get behind the wheel with confidence. Why? Because performance will be there when you need it most. That's the kind of battery we deliver.

Making Your Cougar’s New Battery Last

Did you recently have a new 1984 Mercury Cougar car battery installed? Great job! Now, help it last longer and stay charged by caring for it from the get-go. flipping the dome lights and headlights off when exiting the car, limiting short trips, cleaning your battery posts, and not playing the radio or using other electronics when the engine is turned off.

Commonly Asked Cougar Battery Questions

Get answers to common car battery questions, from Firestone Complete Auto Care. If you have a battery question that's unique to your Mercury Cougar battery, stop by your nearest store. Our expert techs have the answers you need.

Why won't my Cougar battery stay charged? A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you may have a habit of leaving your car doors open and the dome lights on during the night. Stop by for a free battery test at your nearest Firestone Complete Auto Care and learn more about your battery's charge.
What happens to my old Cougar battery? We recycle it! Nearly 100% of all lead-acid batteries are recyclable.
What’s the cost of DieHard batteries for Mercury Cougars? Mercury Cougar batteries can be affordable, especially when there's an available battery coupon. The best part is every DieHard battery comes 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, flaky stuff that can build up around your Cougar’s battery terminals is known as corrosion. Acid leaking from your vehicle’s battery post can have a chemical reaction with the air, leading to an accumulation of the white, powdery substance over time. Corrosion can affect the flow of electricity between your battery and the electrical system in your Cougar, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.
How do I remove corrosion from my Cougar car battery? Regularly inspect the terminals and clean them with a mixture of baking soda and water, a wire brush, and a rag. Disconnect the battery cables before cleaning to help avoid the risk of electrical shock. Always reference and follow the instructions in your vehicle owner’s manual prior to disconnecting the battery cables.
Where can I find a battery for my Cougar? When you need a new battery for your vehicle, Firestone Complete Auto Care is here to help. We sell and install Cougar batteries at our stores nationwide — and our Firestone Direct mobile vans can provide convenient on-site battery services. Learn more about our mobile battery services and book an appointment.