Questions to ask about a car-battery replacement quote
Before you approve a mobile or in-shop battery replacement, ask what was tested, which battery is proposed, what installation includes, which extra fees apply and what the written warranty covers.
Contents
You can only compare battery replacement quotes once you know six things. First, which battery is being replaced. Second, whether testing showed that the battery is the problem. Third, exactly which replacement battery is proposed. Fourth, what the installation includes, including any electronic setup the vehicle needs. Fifth, which extra charges apply, especially for mobile service. Sixth, what the written warranty covers. Ask these questions before you approve the work, and ask for the answers in writing. A low headline price means little if it leaves out a required step or a fee.
One condition changes the whole conversation: which battery the quote is for. Every conventional car has a low-voltage battery, usually 12 volts, that starts the engine or powers the electronics. Hybrids and electric vehicles also have a high-voltage traction battery that drives the car. Hybrids and EVs usually keep a 12-volt battery as well. Replacing the 12-volt battery and replacing the traction battery are very different jobs. Most of this guide covers the 12-volt battery, which is what mobile battery replacement usually refers to. Traction-battery quotes are covered in their own section below.
Confirm which battery the quote covers
If you drive a hybrid or electric vehicle, ask the provider to state in writing whether the quote is for the 12-volt battery or the high-voltage traction battery. Confusing the two can make a quote look far too cheap or far too expensive. It can also mean the wrong job gets booked.
Was the battery actually tested?
A slow start or a dead battery does not always mean the battery has failed. A faulty charging system, or something draining power while the car is parked, can produce the same symptoms. A new battery will not fix either problem, and the new battery may go flat too.
- What test was performed on the current battery, and can I see the result?
- Was the charging system, including the alternator, checked?
- Is there any sign that something is draining the battery while the car is off?
- Could recharging the battery, or cleaning and tightening corroded or loose terminals, solve the problem instead?
- If testing shows the battery is fine, is there a diagnostic or call-out charge?
Which replacement battery is proposed?
The quote should name the brand, model and type of battery, not just say "battery." Common 12-volt types include:
• Conventional flooded batteries.
• Enhanced flooded batteries (EFB), a sturdier version of the flooded design.
• Absorbent glass mat (AGM) batteries, which hold the electrolyte in fiberglass mats.
Vehicles with automatic start-stop, where the engine shuts off at idle, may require a specific type. The battery also has to match the vehicle's physical size and terminal layout, often called the group size. It also has to meet the required cold cranking amps (CCA), a rating of how well the battery can start the engine in cold weather.
- What brand, model and type is the proposed battery?
- Does it match the type, group size and CCA rating specified for my vehicle's model year and equipment?
- If it differs from the original battery, why?
- Is the battery new, and how recently was it manufactured?
Check the answers against your owner's manual or the vehicle manufacturer's specifications, not only the provider's word. Requirements vary by model, model year, market and equipment. This guide cannot confirm what any particular vehicle needs.
What does installation include?
Swapping a battery can involve more than removing one unit and fitting another. On some vehicles, the new battery must be registered or coded to the car's battery management system with a diagnostic tool. Disconnecting power can also erase settings such as radio presets or power-window positions, unless a memory saver keeps the electronics powered during the swap.
- Is labor included in the quoted price?
- Does my vehicle need battery registration or coding after installation, and is it included?
- Will you use a memory saver, or should I expect to reset any settings?
- Are terminal cleaning, the hold-down bracket and any needed hardware included?
- Will you take away the old battery, and is there a core charge (a refundable deposit returned when the old battery is handed back) or a disposal fee?
- Will you test the charging system after installation?
What does mobile service add?
Mobile battery replacement brings the technician to your home, workplace or roadside. The convenience can come with charges that an in-shop quote does not include. Ask for an itemized total, not just the battery price.
- Is there a call-out, travel or service-area fee?
- Do prices differ for evenings, weekends or holidays?
- Is the battery priced the same as it would be in the shop?
- Will the technician bring the correct battery for my vehicle, or might a second visit be needed?
- What happens, and what do I pay, if the technician finds that the battery is not the problem?
- Can the technician do any required registration or coding on site?
What does the written warranty cover?
Warranty terms differ between batteries and providers. Some warranties give a free replacement for a set period. Others are prorated, which means you receive only partial credit toward a new battery as the warranty period goes on. Some combine the two.
- How long is the warranty, and is any part of it prorated?
- Does it cover labor as well as the battery?
- Who honors it: the installer, the battery brand, or any participating location?
- If I used mobile service, will the provider come back to me for a warranty claim, and at what cost?
- What would void the warranty?
- What proof of purchase do I need to keep?
Hybrid traction-battery quotes
Quotes for a hybrid's high-voltage traction battery can differ substantially between providers. Much of the difference comes from what is actually being offered, so make sure each quote spells out the following.
- Is the quote for a full pack replacement, or for repairing or replacing individual modules?
- Is the replacement pack new, remanufactured or used?
- What diagnosis showed that the traction battery is at fault, and can I see the results?
- What warranty comes with the pack and the labor, and who honors it?
- Is any part of the work still covered by the vehicle manufacturer's warranty? Check this in your vehicle's documentation, because coverage varies by market, model year and powertrain.
- Is the technician trained and equipped for high-voltage systems?
Comparing quotes side by side
| Item to confirm | Quote A | Quote B |
| Battery being replaced (12-volt or traction) | | |
| Testing performed and results shared | | |
| Battery brand, model, type, group size, CCA | | |
| Labor included | | |
| Registration or coding included | | |
| Memory saver used | | |
| Old battery disposal, core charge or fee | | |
| Mobile call-out or after-hours fees | | |
| Warranty length, proration and labor coverage | | |
| Itemized total | | |
What this guide cannot tell you
This guide does not give prices. Battery replacement costs depend on the vehicle, the battery type, the provider and the location. It also cannot confirm which battery fits a specific vehicle, how long a battery will last, or how reliable a particular brand or provider is. For those, compare actual written quotes and check them against your owner's manual or the vehicle manufacturer's specifications.
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