Infiniti vehicles lean on strong electrical systems: adaptive headlights, ventilated seats, radar sensors, electronic power steering, and in newer hybrids and start-stop trims, constant cycling at red lights. The battery is not just about cold starts anymore – it’s about keeping stability control, cameras, audio, and comfort features happy.

This guide walks you through the best battery types for Infiniti sedans, coupes, crossovers, and SUVs; which group sizes fit most Infiniti models; how much you should expect to pay; and how to install and maintain your battery for maximum life. When you’re ready to shop, start with curated searches for Group 35 AGM (common in Q50 / G37 / QX50), Group 24F EFB (popular in QX60 / Pathfinder-based platforms), and Group 27F AGM (QX80 / Armada-class SUVs). These groups cover most modern Infiniti fitments and keep you in the right physical size, terminal layout, and output range.

Table of Contents

Quick Picks for Infiniti Owners (By Use Case)

  • Daily driver (Q50 / G37 / QX50), no start-stop: High-quality Flooded/Lead-Acid or EFB with good Reserve Capacity (RC). Common size is Group 35. Browse Group 35 batteries. ~$140–$220 Flooded, $180–$260 EFB
  • Models with start-stop or heavy electrical load (newer QX60 trims, some turbo 4-cyl turbos with idle-stop): Use EFB (good) or AGM (best). Do not downgrade from AGM/EFB to basic flooded – you’ll kill it early and may trigger battery/charging warnings. See AGM Group 35 or Group 24F EFB. ~$190–$350
  • Infiniti with tons of accessories / short-trip city use (QX60, QX80 with seat heaters, theater screens, big audio): AGM preferred for better charge acceptance, spill-proof design, and vibration resistance. Shop AGM best sellers. ~$200–$380
  • Hot climate (desert / southern states): Look for higher RC and heat-tolerant construction like EFB or AGM, plus robust venting. Compare EFB batteries. Heat kills plates faster than mileage does
  • Cold climate / winter starts: Prioritize CCA (Cold Cranking Amps). AGM usually wins here. See high-CCA AGM. Target 650+ CCA for 6-cyl sedans and 800+ CCA for big V8 SUVs
  • QX80 / Armada-class SUV: Use a truck-size high-capacity battery like Group 27F AGM (deep reserve, big CCA). See Group 27F AGM options. ~$220–$380

Top Battery Types for Infiniti (What to Choose & Why)

Type How it works Why/When to Use in an Infiniti Typical Price Shop
Flooded Lead-Acid Traditional liquid electrolyte, vented. Decent CCA, cheaper upfront. Older Infiniti without start-stop (G35, G37, early FX35/45, older M35/M45). Fine if you drive longer highway trips that keep it charged. $130–$200 Group 35 flooded
EFB (Enhanced Flooded Battery) Reinforced plates and improved separators for deeper cycling and better heat tolerance vs basic flooded. Great mid-step for QX60 / QX50 family-haulers and commuters that idle in traffic with A/C blasting. Handles light start-stop use. Often OE or OE-equivalent on newer Nissans/Infinitis with idle-stop. $170–$260 Search Group 24F EFB
AGM (Absorbent Glass Mat) Electrolyte is held in fiberglass mats. Spill-proof, vibration resistant, charges fast, supports high accessory loads, high CCA. Best pick for luxury-load Infinitis (Q50 Red Sport, QX60 Autograph, QX80 with rear-seat entertainment, etc.). Also ideal if you do many short trips, run dashcams while parked, or live in extreme hot/cold climates. $200–$380 AGM Group 35
Hybrid / Auxiliary AGM Some newer luxury powertrains use a standard 12V plus an auxiliary support battery for start-stop or audio/ADAS. If your Infiniti has two batteries (main + aux), replace both with the correct tech. Mixing an old weak aux with a strong new main can still trigger battery warnings. $120–$200 (aux) + main battery cost Aux AGM 12V

Infiniti Model-Specific Buying Tips

  • Infiniti Q50 / Q60 (3.0T, Red Sport): Most trims use Group 35 batteries. High-output twin-turbo V6 plus heated seats, steering, and all the sensors = high demand. An AGM Group 35 is worth it for stability and cranking power. ~$220–$330. Browse AGM Group 35 picks.
  • QX60 (family 3-row crossover): Often runs a Group 24F style battery similar to Nissan Pathfinder. Because this SUV sits in school lines with A/C, screens, rear climate, etc., an EFB or AGM 24F is ideal. ~$180–$300. See Group 24F AGM.
  • QX50 / QX55 (2.0 VC-Turbo compact crossover): Typically uses Group 35. These engines rely on lots of electronic valve timing and compression control. Choose high-CCA AGM to prevent low-voltage gremlins in cold mornings. ~$200–$300.
  • QX80 (5.6L V8 body-on-frame SUV): Big V8 + hydraulic suspension / air shocks / theater packages drains smaller batteries fast. Go with a truck-grade Group 27F AGM with 800+ CCA and high RC. ~$250–$380. Shop 27F AGM truck/SUV batteries.
  • G35 / G37 Sedan & Coupe (VQ35 / VQ37): Classic Infiniti platforms usually take Group 35. If it’s mostly weekend use, a solid flooded/lead-acid is still fine. Daily driven with subwoofers or dashcams? Upgrade to AGM. ~$160–$260.
  • Older FX35 / FX45 / EX35 (first-gen crossovers): Most of these use Nissan-style Group 35. Because these cars are older now, alternators and grounds may not be perfect; a fresh AGM with stronger reserve can help mask voltage dips at idle. ~$190–$280.
  • Hybrid / Start-Stop Infinitis: Many hybrid systems use a dedicated aux 12V battery in addition to the high-voltage pack. Always match OE chemistry (often AGM). Expect $120–$200 for the aux plus the cost of the main battery.

Infiniti Battery Fitment Cheat Sheet (Most-Common Sizes)

Infiniti Model Typical Battery Group Size Recommended Tech Notes Shop Size
Q50 (all engines) 35 AGM (best) / EFB Turbo V6 likes strong CCA. Avoid cheap economy batteries. Shop Group 35 AGM
Q60 (3.0T) 35 AGM Coupes sit more; AGM tolerates storage better and resists sulfation. Group 35 AGM options
QX50 / QX55 35 EFB or AGM Variable compression engine = sensitive electronics. Don’t underspec. Group 35 choices
QX60 (3-row crossover) 24F EFB (good) / AGM (best) Lots of A/C idling in traffic. Extra RC is valuable for families. Group 24F AGM
QX80 (5.6L V8) 27F AGM truck/SUV Needs high CCA for the V8 and high RC for rear entertainment & air suspension. 27F AGM truck batteries
G35 / G37 35 Flooded (budget) / AGM (premium) Older cars can use standard flooded, but AGM gives stronger cranking after the car sits all week. Group 35 fit
M35 / M45 / M37 / M56 (Infiniti M / Q70 lineage) 35 (some trims 24F) AGM preferred Luxury sedans with lots of modules awake at idle. AGM stabilizes voltage dips. AGM sedan batteries

Spec Targets: CCA, RC, and Warranty

CCA: Cold Cranking Amps
RC: Reserve Capacity
Tech: Flooded / EFB / AGM
  • CCA: Match or slightly exceed factory spec. In cold climates, aim for +50–100 CCA above the OEM minimum, especially for turbocharged V6 and big V8 Infinitis.
  • RC (Reserve Capacity): Higher RC means the battery can power lights, HVAC blowers, seat heaters, rear-seat screens, and phone chargers longer with the engine off. This matters in school pickup lines and tailgates.
  • Technology: If your Infiniti shipped with EFB or AGM, stay with that chemistry. Downgrading to bargain flooded often leads to dim headlights at idle, stop/start disabled messages, or battery warnings.
  • Warranty: Target a free-replacement period of at least 36 months on premium AGM. Budget flooded batteries may be 18–24 months. Long warranty usually signals thicker plates and better build.
  • Terminal orientation & hold-down style: Infiniti/Nissan platforms typically use “Japanese”/JIS-style clamps or specific bottom hold-down lips. Make sure the posts are on the correct side (for example, Group 24F is opposite polarity vs 24).

Best Car Battery Brands for Infiniti & Where to Buy

Brand / Line Why It’s Popular for Infiniti Typical Tech Where to Look
ODYSSEY / NorthStar-style premium AGM Very high CCA and RC. Great for QX80, tow/haul, aftermarket audio. AGM High-CCA Group 27F AGM
DieHard / Interstate / Bosch AGM lines Strong nationwide support, good warranties, widely stocked in common Infiniti group sizes (35, 24F, 27F). AGM / EFB Group 35 AGM search
EverStart Maxx / Value-tier flooded Budget-friendly, fine for older G35/G37 weekend cars that aren’t daily-driven. Flooded Big-box stores & warehouse clubs, some listings via Group 35 flooded batteries
OEM / Genuine Infiniti-labeled Drop-in fit, correct vents and sensors, matches vehicle’s charging profile. Usually EFB or AGM on newer trims. EFB / AGM Infiniti dealer parts counter (sometimes surprisingly competitive on price)
  • Buy online when you know your group size: For Q50/Q60/QX50, searching “Group 35 AGM” is usually safe. Example: Group 35 AGM.
  • Buy in-store if you’re unsure: Stores can load-test your old battery, confirm tray size, and sometimes install on the spot.
  • Core charge: Most retailers give you money back when you return your old battery. Bring it with you.

How to Check Freshness & Authenticity

  • Build date code: Batteries age on the shelf. Look for a sticker or stamp (often “A4” style where A=January, 4=2024, etc.). Pick the newest one you can find, ideally < 3 months old.
  • Seals & caps: Brand-new AGM/EFB batteries should not have cracked, missing, or obviously resealed vent caps.
  • Label quality: Off-center, blurry, or peeling labels can indicate a relabeled/rebuilt unit. Stick with reputable sellers.
  • Voltage at rest: A healthy, fresh AGM should read roughly 12.6–12.8V with no load. Anything under ~12.3V before installation suggests it’s been sitting discharged.

Car Battery Warranty Tips

  • Free replacement window matters more than “pro-rated” years: A 3-year full replacement is better than 1-year full + 5-year pro-rated.
  • Keep the receipt: Most chains require proof of purchase for warranty swaps. Snap a phone photo.
  • Watch for electrical mods: Aftermarket amps, light bars, dashcams wired always-on, etc. can void warranty if they’re deemed “parasitic draw.” Use fused add-a-circuit taps, not twisted bare wires.
  • Dealer batteries: Infiniti dealer parts often match or beat aftermarket warranty length (varies by region). Ask.

Infiniti Car Battery Installation Guide (DIY or Shop)

  1. Save memory settings (optional but nice): Some Infinitis lose radio presets, seat memory, or window auto-up/down calibration when power is cut. You can plug in a 12V memory saver at the OBD-II port if you have one.
  2. Engine OFF, keys out: Park, turn everything off, pop the hood. On some older Infinitis the battery is slightly tucked under a brace – give yourself light and space.
  3. Locate and note polarity: Positive (+) is usually covered with a red cap. Take a quick phone photo so you remember cable routing.
  4. Disconnect negative (-) first: Loosen the negative terminal and move it aside so it cannot spring back to the post. Then disconnect the positive (+).
  5. Remove hold-down bracket: Most Infiniti trays use a small metal or plastic clamp at the base/front of the battery. Remove it and lift the battery out carefully (they’re heavy).
  6. Clean the tray and terminals: Use a battery terminal brush or mild baking soda/water mix to neutralize corrosion. Dry everything.
  7. Drop in the new battery: Make sure it sits flat in the tray, correct orientation (positive on the same side as before), and reinstall the hold-down so the battery can’t move under braking.
  8. Reconnect positive (+) first, then negative (-): Tighten the clamps snugly. Loose terminals = voltage dips and random warning lights.
  9. Start the vehicle: Confirm a strong crank, check for warning lights, reinitialize auto-up windows if needed (hold window switch up for a few seconds at full close).
  10. Dispose / return core: Bring the old battery back for proper recycling and core refund.

Infiniti Car Battery Maintenance & Longevity

  • Drive it long enough: Short 5-minute trips never fully recharge a modern battery. Aim for at least one longer (20+ minute) drive each week so the alternator can top it off.
  • Use a smart charger if the car sits: Weekend-only G37 or Q60 garage queen? Hook up a low-amp smart maintainer compatible with AGM. This prevents sulfation and keeps start power strong. Search AGM smart maintainers.
  • Keep terminals tight and clean: Infiniti engine bays run warm. Heat + loose clamps = oxidation. Check every oil change.
  • Watch parasitic drains: Dashcams, radar detectors, OBD-II dongles, and aftermarket amps can pull power while parked. Hardwire accessories to switched power or use low-voltage cutoffs.
  • Don’t ignore slow crank: Slow cranking today often becomes “click, no start” tomorrow, usually at the worst possible time (rain + groceries + kids). Replace proactively.

Signs You Need a New Battery

  • Engine cranks slower than normal, especially first start of the morning.
  • Intermittent “Battery/Charging System” or “Key Not Detected” warnings that go away after restarting.
  • Headlights flicker or dim at idle but look normal when you rev lightly in Park/Neutral.
  • Heated seats, steering wheel heat, or infotainment randomly shut off under load (voltage protection).
  • The battery is 4+ years old (AGM) or 3+ years old (flooded) and you’re seeing any of the above.

Contact Infiniti Customer Service & Support

Why contact Infiniti directly?
  • To confirm the exact OEM battery group/chemistry for your VIN.
  • To ask about warranty coverage if your battery failed early.
  • To see if your vehicle has an Intelligent Charging System or dual-battery setup that needs programming after replacement.
How to reach them:
  • Infiniti Owner Support / Customer Affairs (phone or chat via Infiniti’s official owner site).
  • Local Infiniti retailer’s parts counter: they can look up the correct battery group size, vent tube style (if required), and quote install labor.
  • Dealer locator / service scheduler on Infiniti’s official website can point you to the nearest authorized service center for testing and install.

Infiniti Car Battery FAQs

Can I upgrade from a standard flooded battery to AGM in my Infiniti?
Yes, in most Infiniti models AGM is considered an upgrade. AGM (Absorbent Glass Mat) batteries handle higher electrical loads, recharge faster after short trips, and tolerate deep discharge cycles better than traditional flooded lead-acid batteries. This is helpful for Infinitis with lots of electronic features (power seats, cameras, heated/ventilated seats, premium audio). You can safely move from flooded → AGM. What you should not do is downgrade from AGM → basic flooded in a vehicle that expects AGM-level stability, especially if it uses an intelligent charging system or idle-stop.

Do I need a special battery for start-stop / idle-stop in my Infiniti?
If your Infiniti is equipped with start-stop (the system that shuts the engine off at traffic lights), you should be running at least EFB (Enhanced Flooded Battery) or AGM. These batteries are designed to handle many restarts per day and heavy accessory use while the engine is off. Dropping in a cheaper standard flooded battery can shorten life dramatically, throw warning lights, or cause weak restarts in traffic.

How long should a Infiniti car battery last?
Most Infiniti batteries last about 3–5 years in normal mixed driving. Lots of short, low-speed trips (where the alternator or DC-DC doesn’t fully recharge the battery), extreme summer heat, sub-freezing winters, or heavy accessory draw at idle (A/C blasting while parked, lights on, sound system up) can shorten that to 2–3 years. Highway-driven Infinitis that get regular full recharges and aren’t exposed to constant heat soak can sometimes stretch past 5 years, but that’s the exception, not the rule.

How much is a Infiniti car battery?
You’ll typically see: ~$100–$180 for a standard flooded lead-acid battery in smaller Infiniti sedans and older models; ~$150–$250 for EFB in vehicles equipped with start-stop; and roughly $200–$350 for a high-quality AGM in larger SUVs or tech-heavy trims. Bigger case sizes (H6, H7, H8), higher Cold Cranking Amps (CCA), and longer Reserve Capacity (RC) tend to sit at the higher end of those price ranges.

What size battery does my Infiniti need?
Infiniti models use specific physical case “group sizes” (for example: Group 35, Group 24F, H6/Group 48, H7/Group 94R). You need to match the physical footprint, terminal orientation, and hold-down style so it actually fits the tray and cables. The safest approach is to read the label on your current battery or check the owner’s manual before ordering. As a rule: meet or exceed the factory Cold Cranking Amps (CCA) and Reserve Capacity (RC), don’t go lower.

When should I replace the battery instead of just recharging it?
Replace (don’t just recharge) if you’re seeing slow crank first thing in the morning, repeated low-voltage warnings even after a long highway drive, flickering dash or infotainment reboots during startup, or corrosion/bulging on the case. Those are classic signs of a battery that’s lost internal capacity. Jump-starting over and over is a band-aid and can stress the starter, alternator, and electronics.

Does warranty matter when choosing an Infiniti battery?
Yes. Prioritize a clear free-replacement warranty period (often 24–36 months on quality AGM/EFB batteries) instead of only pro-rated coverage where you just get partial credit. Strong warranty terms usually track with better internal plate design, better heat resistance, and better vibration durability — all important for heavier Infiniti SUVs and performance trims that see more electrical load.

Bottom line: Infiniti vehicles pull a lot of power even at idle, so don’t cheap out on the battery. Step 1 is always correct group size (35, 24F, 27F are the big three). Step 2 is matching or upgrading the technology (EFB or AGM if equipped). Step 3 is staying ahead of failure: once you notice slower cranking or random low-voltage warnings, replace before you’re stranded.
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