What an Advance Auto battery does and why it matters

A car battery stores electrical energy and delivers it to your starter motor, alternator, and all the electrical systems in your vehicle. When you turn the key or press the start button, the battery sends a surge of power to crank the engine. Once the engine runs, the alternator takes over and both powers your car and recharges the battery for the next start.

Advance Auto Parts is a retail chain that sells batteries, along with other automotive parts and maintenance items. You can buy a battery there, have it installed, or handle the installation yourself if you have the tools and knowledge. The battery itself — whether you buy it from Advance Auto or elsewhere — works the same way in your car.

Understanding how your battery works and what happens when it fails helps you recognize warning signs before you're stranded. Most car batteries last three to five years, though that varies based on climate, how often you drive, and how well you maintain your electrical system.

Key Takeaways

  • Car batteries convert chemical energy into electrical power to start your engine and run your vehicle's electrical systems.
  • A dead or failing battery shows warning signs like slow cranking, dim headlights, clicking sounds when you turn the key, or a battery warning light on your dashboard.
  • Most car batteries last between three and five years, depending on your climate and driving habits.
  • You can purchase a replacement battery at Advance Auto Parts, a retailer, or at many other automotive shops, service stations, and big-box stores.
  • Battery replacement typically takes 15 to 30 minutes if done by a technician, or longer if you do it yourself without prior experience.

Signs your battery is failing or dead

A battery that is losing power usually shows one or more of these warning signs before it stops working completely. The most common is slow cranking — when you turn the key, the engine turns over more slowly than usual, or makes a grinding sound. This happens because the battery doesn't have enough charge to spin the starter motor at full speed.

Other signs include dim or flickering headlights, especially when the engine is off or idling. If your dashboard lights flicker or fade when you press the brake pedal or use the windshield wipers, that's another indicator. Some cars have a battery warning light on the dashboard — usually a battery symbol or the letters "ALT" — that turns on when the charging system isn't working properly.

A clicking sound when you turn the key, with no engine cranking at all, usually means the battery is too dead to turn the starter. If your car won't start and you hear nothing — no clicking, no cranking, no sound at all — the battery may be completely discharged, or there may be a problem with the starter or alternator instead.

How to check if your battery needs replacement

The most reliable way to know whether your battery is failing is to have it tested. Advance Auto Parts offers free battery testing in-store — you bring your car to a location, and a technician uses a battery tester to measure the charge and health of your battery. Many other auto parts retailers, service stations, and dealerships offer the same service at no charge.

A battery tester measures how much voltage your battery is holding and how well it can deliver power under load. A healthy battery typically reads around 12.6 volts when the engine is off. If it reads below 12 volts, the battery is discharged or failing. The tester also checks whether the battery can hold that charge and deliver power when the starter demands it.

If you want to test the battery yourself, you can buy an inexpensive multimeter (a handheld electrical tester) at any hardware store or auto parts shop. Set it to DC volts, touch the red probe to the positive terminal and the black probe to the negative terminal, and read the voltage. Again, 12.6 volts or higher is normal; below 12 volts suggests the battery needs charging or replacement.

Battery types and what they cost

Car batteries come in different sizes and power ratings, determined by your vehicle's make, model, and year. The most common type is a lead-acid battery, which uses lead plates and sulfuric acid to store and release electrical energy. Lead-acid batteries are reliable, affordable, and work in nearly all cars.

Within lead-acid batteries, you'll see terms like "starting" (designed to crank the engine), "deep cycle" (designed to power accessories over time), and "AGM" or absorbed glass mat (a sealed type that resists vibration and spilling). Most cars use a starting battery. Advance Auto Parts carries all three types, and the staff can tell you which one your car needs if you provide your vehicle's year, make, and model.

Prices vary widely based on the battery type, brand, and power rating. A basic lead-acid battery might cost $80 to $150, while a premium or AGM battery can run $150 to $300 or more. Advance Auto Parts and other retailers often run promotions, offer discounts for trading in your old battery, or provide warranty coverage that extends the useful life of the battery you buy.

How to replace a car battery yourself

If you have basic tools and some mechanical confidence, you can replace a car battery without taking it to a shop. The process takes 15 to 30 minutes. You'll need a wrench or socket set (usually 8mm, 10mm, or 13mm), a battery terminal puller (optional but helpful), and safety glasses or gloves to protect yourself from battery acid.

Start by turning off the engine and all electrical systems. Locate the battery under the hood — it's usually a rectangular plastic box with two thick cables attached. Disconnect the negative terminal first (the black cable, usually marked with a minus sign). Then disconnect the positive terminal (the red cable, marked with a plus sign). This order matters: disconnecting negative first prevents accidental sparks.

Remove the battery hold-down bracket or strap that keeps the battery in place, then lift the battery out. It's heavy — usually 30 to 50 pounds — so use your legs and get help if needed. Set the old battery aside (retailers like Advance Auto Parts will take it for recycling when you buy a new one). Place the new battery in the same position, find it with the hold-down bracket, then reconnect the positive terminal first, then the negative terminal. Start the engine to confirm everything works.

When to have a technician replace your battery

If you don't have tools, aren't comfortable working under the hood, or your car has a battery in a difficult location (some newer vehicles have batteries in the trunk or under the rear seat), a technician can do the job. Advance Auto Parts offers battery installation at many locations for a flat fee, usually $15 to $40 depending on the location and battery type. Other auto parts retailers, service stations, and dealerships offer installation as well.

A technician will test your current battery to confirm it's the problem, remove the old battery safely, install the new one, and test the charging system to make sure the alternator is working. The entire process usually takes 30 minutes to an hour. If the technician finds that your alternator isn't charging the battery properly, that's a separate repair that costs more and takes longer.

Some dealerships include battery replacement as part of routine maintenance or warranty coverage, so check your owner's manual or call your dealer before you pay out of pocket. If your car is still under warranty, the dealer may replace the battery at no charge.

How to extend your battery's life

A few straightforward habits can help your battery last longer. Keep your battery terminals clean and free of corrosion — a white, blue, or green crusty buildup on the terminals reduces the connection between the battery and your car's electrical system. If you see corrosion, disconnect the terminals, scrub them with a wire brush and baking soda mixed with water, rinse, and reconnect.

Avoid leaving electrical systems running when the engine is off — this drains the battery without the alternator recharging it. If you leave your headlights, interior lights, or radio on overnight, the battery may be too discharged to start the engine the next morning. In cold climates, park in a garage if possible; cold temperatures reduce a battery's ability to deliver power, and a battery that's already weak may fail in freezing weather.

If you drive infrequently, consider a battery maintainer or trickle charger — a device that plugs into a wall outlet and slowly charges your battery while your car sits unused. This prevents the battery from self-discharging over weeks or months. Advance Auto Parts and other retailers sell these devices for $20 to $60.

Frequently Asked Questions

How do I know what battery size my car needs?

Check your owner's manual, look at the label on your current battery, or provide your vehicle's year, make, and model to a staff member at Advance Auto Parts or any auto parts retailer. They can tell you the correct battery group size and cold-cranking amps (CCA) rating your car requires. Never guess — using the wrong size can damage your electrical system or fail to start your engine.

Can I drive with a weak battery, or will it leave me stranded?

A weak battery may start your car once or twice, but it will eventually fail completely, often at an inconvenient time. If your battery is showing warning signs, have it tested and replaced before it dies. Driving with a failing battery risks being stranded far from help, especially in cold weather when the battery performs even worse.

What should I do if my car won't start and I think it's the battery?

Try jump-starting the car using jumper cables and another vehicle with a working battery. If the car starts and runs normally, the battery was likely discharged but not dead. Drive to Advance Auto Parts or another retailer for a free battery test. If the car won't start even after jump-starting, the problem may be the starter, alternator, or a bad connection rather than the battery.

Do I need to reprogram my car after replacing the battery?

Most cars do not require reprogramming after a battery replacement. However, some newer vehicles with computers may lose certain settings — radio presets, clock time, seat position memory — when the battery is disconnected. Your owner's manual will tell you if reprogramming is necessary. Dealerships can reprogram your car if needed, usually for a small fee.

Is it better to buy a battery at Advance Auto Parts or somewhere else?

Battery quality and price vary by brand and retailer, not by where you buy it. Advance Auto Parts, other auto parts chains, service stations, dealerships, and big-box retailers all carry batteries from the same manufacturers. Compare prices, warranty length, and installation fees if you need that service. Many retailers offer similar warranties and return policies, so choose based on convenience and price.