How much is a new battery for a 2018 Honda Accord

As of 2025, expect to pay about $180–$300 for the 12‑volt battery itself for a 2018 Honda Accord, or roughly $260–$450 installed at a shop or dealer. If you own a 2018 Accord Hybrid, the 12‑volt auxiliary battery typically runs $160–$260 for the part, while the high‑voltage traction battery—if ever needed—can cost about $3,000–$5,500 installed. Costs vary by battery type (flooded, EFB, AGM), brand, and where you have it installed.

What you’ll pay by configuration

Gasoline models (1.5T and 2.0T)

Most 2018 Accord gasoline trims use a 12‑volt battery compatible with idle stop/start, which often calls for an EFB (Enhanced Flooded Battery) or AGM (Absorbent Glass Mat) unit. While a basic flooded battery is cheaper, using EFB/AGM is advisable to preserve stop/start performance and longevity.

Typical price ranges in 2025:

• Battery only: $130–$200 (standard flooded), $180–$250 (EFB), $200–$300 (AGM)
• Installed at an independent shop: $240–$380 including labor, battery registration/reset, and fees
• Installed at a Honda dealer: $300–$450 including labor and system reset

Independent shops can be cost‑effective, but ensure they can reset the car’s battery/idle‑stop monitoring system after installation.

Hybrid model

The 2018 Accord Hybrid uses two batteries: a conventional 12‑volt auxiliary battery and a high‑voltage traction battery pack.

Typical price ranges in 2025:

• 12‑volt auxiliary battery: $160–$260 for the part; $240–$380 installed
• High‑voltage traction battery: about $3,000–$5,500 installed (remanufactured on the low end; new OEM on the high end)

Many 2018 Accord Hybrids may still be within federal or state hybrid battery warranty windows (commonly 8 years/100,000 miles federal; up to 10 years/150,000 miles in CARB states), so check warranty status before paying out of pocket for a traction battery.

Quick price snapshot by scenario

The following common scenarios summarize what most owners actually pay.

• DIY 12‑volt replacement (gas model): $150–$280 after taxes/fees (don’t forget the core charge refund when you return the old battery)
• Shop-installed 12‑volt (gas model): $260–$380 at independents; $300–$450 at dealers
• Hybrid 12‑volt auxiliary: $240–$380 installed
• Hybrid traction battery: $3,000–$5,500 installed, often warranty‑eligible depending on age/mileage and state

Your exact cost will depend on battery type, brand, and local labor rates, plus whether a battery monitoring system reset is performed.

Factors that affect price

Several variables drive the final tally beyond the sticker price on the battery.

• Battery type: Flooded is cheapest; EFB and AGM cost more but handle start/stop cycling better.
• Cold Cranking Amps (CCA) and reserve capacity: Higher specs cost more and may be recommended in colder climates.
• Brand and warranty length: Premium brands with 3‑year free replacement coverage usually cost more up front.
• Labor and shop fees: Expect 0.3–0.6 hours labor plus shop supplies; dealers tend to charge more.
• Programming/reset: The Accord’s battery sensor/idle‑stop system should be reset; some shops include this, others charge extra.
• Taxes and core charge: A refundable core charge ($10–$25) applies until you return the old battery.

Choosing the right type and ensuring a proper reset can improve performance and battery life, often offsetting a slightly higher initial price.

What size/type battery does the 2018 Accord use?

Most non‑hybrid 2018 Accords commonly take a Group 47 (H5) battery, often specified as EFB or AGM for vehicles equipped with idle stop/start. Some fitment guides list Group 51R options for certain trims or regions. The Hybrid’s 12‑volt auxiliary battery may differ (often a compact group and frequently AGM). Always verify fitment by VIN in your owner’s manual or a reputable parts catalog, and match or exceed the original CCA rating (typically in the 500–650 CCA range).

Installation, reset, and warranty

After installation, the battery management/idle‑stop system should be reset or registered to ensure proper charging and stop/start functionality. Many shops perform this with a scan tool; DIYers can use a memory saver to preserve settings and then have a shop perform the reset if needed. OEM Honda replacement batteries often carry 3 years of free replacement (with prorated coverage afterward), while quality aftermarket units typically offer 2–3 years free replacement. For the Hybrid traction battery, warranty terms may be 8 years/100,000 miles federally and up to 10 years/150,000 miles in CARB states—check your warranty booklet and state coverage.

How to get the best price

A little preparation can lower your out‑the‑door cost and help you get the right battery the first time.

1. Confirm your exact battery group and type by VIN in the owner’s manual or trusted fitment database.
2. Decide on EFB or AGM if you use idle stop/start frequently; it improves durability versus basic flooded.
3. Call at least three sources (dealer, independent shop, and a parts retailer) and ask for installed quotes including reset.
4. Ask about promotions, mail‑in rebates, and pro‑rated warranty terms; return the core promptly for a refund.
5. If DIY, use a memory saver and plan to have the battery monitoring system reset afterward if your tools can’t do it.

Comparing like‑for‑like quotes (same type, CCA, and included services) is the best way to ensure you’re getting fair value.

Signs you may need a new battery

Knowing the symptoms helps you avoid a no‑start and replace the battery proactively.

• Slow cranking or dimming lights on startup
• Frequent loss of idle stop/start functionality
• Battery warning light or electrical gremlins (clock/radio resets)
• Battery age over 3–5 years, especially in hot or very cold climates

Have the battery load‑tested if you notice these issues; many parts stores and shops will test it for free.

Summary

For a 2018 Honda Accord, a new 12‑volt battery typically costs $180–$300 for the part and $260–$450 installed, with EFB/AGM recommended for models with idle stop/start. The 2018 Accord Hybrid’s 12‑volt auxiliary battery falls in a similar installed range, while the high‑voltage traction battery—if ever needed—runs about $3,000–$5,500 installed and may still be under warranty depending on your state and mileage. Verify the correct group size and ensure the battery monitoring system is reset after installation for best results.

How much does it cost to replace a battery in a Honda Accord?

Honda Accord Battery Replacement Costs: Around $75 to $200. Honda Accord Hybrid Battery Replacement Costs: Around $2,000 to $8,000.

How much is a battery for a 2018 Honda Accord?

How much to replace the battery in my Honda? Depending on power, size, and quality, prices for a replacement car battery range from about $45 to $250.

How long does a 2018 Honda Accord battery last?

between 3 to 5 years
Your 2018 Honda Accord battery will regularly last between 3 to 5 years, but that can vary heavily depending on type of battery, battery size, weather conditions and driving habits.

How much does a battery cost at the Honda dealership?

Typically a new battery for your Honda vehicle will cost between $75 and $200 dollars.