Why won’t my 911 battery hold a charge?

A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you’ve been leaving the doors slightly open and the lights on overnight. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.

What happens to my old 911 battery?

We recycle it, taking care of both your car and the Earth.

How much do DieHard batteries cost for your Porsche 911?

Get affordable prices on Porsche 911 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.

How long can I expect my car battery to last?

You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.

Why is there white, crusty buildup on my 911’s battery post?

The white, flaky stuff that can build up around your 911’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 911, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.

What do I do about corrosion on my 911 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 911 owner’s manual for instructions on how to do so.

Where can I find a battery for my 911?

Your local Firestone Complete Auto Care sells and installs 911 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.

Car Batteries for 1984 Porsche 911

Get a New Porsche Battery

Get a Battery for Your Porsche 911

Don’t let a dead battery stop you. Shop replacement car batteries for your 1984 Porsche 911 at Firestone Complete Auto Care.

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1984 Porsche 911 Battery Replacement & Size

Need more info about Porsche 911 batteries? Use the following chart to find information on Porsche 911 battery size and cold cranking amps.

Battery	Engine	Warranty		Cold Cranking Amps
49H8	H6/3.2L	Replacement 36 months	Performance months	900
H8-AGM	H6/3.2L	Replacement 36 months	Performance months	900
49H8	H6/3.3L	Replacement 36 months	Performance months	900
H8-AGM	H6/3.3L	Replacement 36 months	Performance months	900

BATTERIES
H6/3.2L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
H6/3.2L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
H6/3.3L - Battery: 49H8 - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900
H6/3.3L - Battery: H8-AGM - Warranty: Replacement 36 months, Performance months - Cold Cranking Amps: 900

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Buy the Right Battery for Your Porsche 911

Your 911 doesn't have an expiration date, but its battery does. The average car battery lasts three to five years. Don’t get stranded by your 911’s car battery. Replace it regularly instead! 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, swollen battery case, corroded battery terminals, or weak lights can all signal that your battery is waving goodbye.

Plus, at Firestone Complete Auto Care, we’ll test your battery for free. With best-in-class tools we can tell you how much "life" is left in your battery. Visit us for a complimentary battery check and, if necessary, a battery replacement to help keep your 1984 Porsche 911 running! Automotive batteries are just one of our many areas of expertise. Our technicians are well-acquainted with Porsche’s service specs for 911 battery cold cranking amps and reserve capacity. Get help figuring out the battery size that matches your vehicle, and schedule a weekday or weekend battery replacement service for your car.

Firestone Has DieHard Batteries for 911s

We know what’s best for your Porsche 911, which is why we exclusively carry the best. Your 911 needs a reliable, durable and powerful battery that can handle most extreme environments and weather conditions. DieHard batteries go above and beyond using state-of-the-art advancements to meet the expanding power requirements of modern vehicles They're no ordinary battery, they're extraordinary. Choose a DieHard battery for your Porsche 911 and have the peace of mind that performance will be there when you need it most. That's the kind of battery we deliver.

After Buying 1984 Porsche 911 Battery

Got a new car battery installed in your 1984 Porsche 911? Great job! Give your new car battery the best start with proper care. turning off all of the lights when you leave your vehicle, decreasing the number of short trips you take, keeping the battery posts corrosion-free, and not playing the radio or using other electronics when the engine is turned off.

Commonly Asked 911 Battery Questions

Turn to Firestone Complete Auto Care for answers to all your car battery questions. If you have a 911-specific battery question, visit your nearest store. Our technicians have the answers.

Why won’t my 911 battery hold a charge? A car battery that needs to be jump-started every time is as good as dead. The battery may be too old. Or, you’ve been leaving the doors slightly open and the lights on overnight. Stop by for a complimentary battery check at your local Firestone Complete Auto Care and get a handle on your car battery’s health.
What happens to my old 911 battery? We recycle it, taking care of both your car and the Earth.
How much do DieHard batteries cost for your Porsche 911? Get affordable prices on Porsche 911 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.
How long can I expect my car battery to last? You can usually get three to five years out of your car battery. However, battery type, how well you maintain your battery, and your driving habits can all affect your battery’s lifespan.
Why is there white, crusty buildup on my 911’s battery post? The white, flaky stuff that can build up around your 911’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 911, possibly causing issues with electrical performance and starting. If left unaddressed for long enough, it may even cause your battery to prematurely fail.
What do I do about corrosion on my 911 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 911 owner’s manual for instructions on how to do so.
Where can I find a battery for my 911? Your local Firestone Complete Auto Care sells and installs 911 batteries in your neighborhood. Our Firestone Direct mobile vans can even come to you and do it! Learn more about mobile battery services.