Car Battery Group Size Chart (Find Your Fit)

The wrong battery group size either won’t fit the tray or will leave your terminals in the wrong spot. Use this chart to find the correct group size for your car, truck, or SUV by make and model, then confirm the cold cranking amps (CCA) before you buy.

Group size is a physical standard set by the Battery Council International (BCI). It defines the battery’s length, width, height, and terminal position. Getting it right is the first step. Getting the right CCA for your climate and engine is the second.

What Does Battery Group Size Mean?

Battery group size is a code that tells you the physical dimensions of the battery case and the location of its positive and negative terminals. Common group sizes include 35, 24F, 48 (also called H6), 65, 75, 78, and 94R (also called H7).

The number itself is a BCI designation, it doesn’t map directly to volts, amps, or capacity. Two batteries with the same group size can have very different CCA ratings. A Group 35 battery from one brand might be 550 CCA; another might be 640 CCA. Both will physically fit your car. Which one you buy depends on your climate and starting requirements.

The “R” suffix (as in 35R or 47R) means the positive terminal is on the right side when you’re facing the battery. Standard Group 35 has the positive on the left. If your tray and cables are set up for a terminal-right orientation, you need the R version. Swapping an R for a non-R often means your cables won’t reach.

Car Battery Group Size Chart: Cars and Compact SUVs

The table below covers the most common passenger cars and compact SUVs sold in the U.S. Year ranges are approximate. If your model is a hybrid or uses a start-stop system, check your owner’s manual first, those often call for an AGM (absorbent glass mat) battery at the correct group size.

Car Battery Group Size Chart: Trucks, Full-Size SUVs, and Vans

Trucks and full-size SUVs usually take higher-CCA batteries. Cold cranking amps matter more here because larger engines need more current to turn over, and many truck owners live in colder climates where CCA drops significantly below freezing.

Note: Always confirm your exact group size against the sticker on your current battery or your owner’s manual. Year ranges above are approximate. Trim level and engine option can change the spec, a V6 and a V8 version of the same truck sometimes take different group sizes.

Common Battery Group Sizes Explained: 24F, 35, 47, 48, 65, 75, 78, 94R

Here’s what each common group size covers, who uses it, and what trips people up at the parts counter.

Group 35 and 35R

The single most common group size in the U.S. market. Most Japanese-brand cars sold in the U.S. use it: Toyota, Subaru, Mazda, Nissan, Kia, and many Hyundai models. It’s small enough to fit a Corolla and strong enough for a Titan. The standard 35 has its positive terminal on the left (facing the battery). The 35R is the mirror image, positive on the right. Know which your car needs before you order, because most stores stock one variant in depth and carry the other as a special order.

Group 24F

Common on older Honda Accords, Toyota Tundras, 4Runners, and Sequoias. The “F” means “front terminal” in older BCI nomenclature, don’t over-think it. It’s a physically larger battery than a 35, so it carries more reserve capacity. If your car is in the table above with 24F, don’t try to fit a 35, the tray won’t hold it properly and the hold-down bracket won’t reach.

Group 47 (H5) and Group 48 (H6)

These are the European-metric equivalent sizes. An H6 is the same battery as a BCI Group 48. An H5 is the same as a Group 47. Many VW, Audi, and newer GM products use them. The H-series designation comes from the DIN/EN standard; the BCI number is the North American version. When a store’s computer shows “H6” and you’re searching for “48,” they’re the same battery, look at the actual physical dimensions to confirm.

Group 65

Ford’s primary battery group for F-Series trucks, Expeditions, and many Explorer years. It’s a wide, tall battery, don’t try to substitute a Group 78 from a Silverado, even though the CCA ratings overlap. The dimensions are different and the terminal placement won’t match.

Group 75 and Group 78

Group 75 is an older GM car battery (Malibu, Impala, older Buick). Group 78 is the heavy-duty version for GM trucks and vans, Silverado, Sierra, Tahoe, Suburban, Express. The 78 is physically larger and carries higher CCA. They share a terminal layout but have different footprints. A 78 won’t fit a 75 tray.

Group 94R (H7)

The premium Euro-platform group size. RAM trucks switched to it around 2013; Dodge Durango, Jeep Grand Cherokee (pre-2022), BMW, Audi, and Mercedes all use it. It’s a larger physical footprint than an H6 and supports higher CCA ratings. The “R” suffix here refers to a specific terminal layout. AGM versions of the 94R are common, some European brands require AGM and won’t work properly with a flooded-cell battery at the same group size.

Group 51R

Compact Hondas (Civic, CR-V, Accord 2013+, Pilot, Ridgeline). The “R” orientation is standard for this application, there’s no non-R version you’d use in these cars. At 410 CCA minimum it’s among the lower-rated group sizes, which is fine for four-cylinder engines that don’t need much current to start.

Cold Cranking Amps (CCA): How Much Do You Actually Need?

CCA is the number of amps a battery can deliver at 0 degrees F for 30 seconds while maintaining at least 7.2 volts. It’s the standard measure of starting power in cold conditions. The tables above list minimums, you can go higher, but you can’t go lower and expect reliable cold starts.

A rough working rule: you need about 1 CCA per cubic centimeter of engine displacement. A 2.0L (2,000cc) engine needs about 400 CCA minimum; a 5.3L (5,300cc) V8 needs 500-plus. That’s the floor. In cold climates (Minnesota, Montana, the northern half of Canada), add 20-30% to that floor, a 550 CCA minimum becomes a 700 CCA real-world target when temperatures regularly hit -20F.

CCA is not the same as CA (cranking amps). CA is measured at 32F, not 0F, it produces a higher number for the same battery. Some budget batteries are rated in CA to look stronger on the shelf. If two batteries list different numbers without specifying the temperature, the CA-rated one is not as strong as the number suggests. Always compare CCA to CCA.

Reserve capacity (RC) is a separate spec: the number of minutes a fully charged battery can deliver 25 amps at 80F before dropping below 10.5 volts. It’s your “how long will I sit if the alternator dies” number. For most daily drivers, a 90-120 minute RC is plenty. If you run a lot of accessories (winch, auxiliary lights, upfitter equipment), push toward 150+ RC.

If you’ve ever replaced a power tool battery and wondered why a higher Ah pack runs longer even at the same voltage, the underlying idea is the same, capacity determines runtime, while CCA (or peak discharge rate for tools) determines starting or peak power. Our power tool battery voltage and amp hours guide breaks down the parallel concept for tool batteries.

CCA also determines whether a portable jump starter will actually start your engine. Most jump starters advertise peak amps instead of CCA because it produces a much larger number, but that figure doesn’t predict real-world cranking ability. See our jump starter amps guide for what each spec means and how to size a unit to your vehicle.

How to Read Your Old Battery’s Label

If you still have the old battery in the car, the group size is stamped on the top or front of the case, usually in large print like “35” or “Group 65” with a sticker or molded-in text. Look for the BCI number, usually displayed as “Group XX” or just “XX” in a circle or box.

If the label is unreadable, look for the date code. Most batteries have a two-character code stamped into the case: a letter for the month (A = January, B = February, through L = December) and a single digit for the year. “B6” means February 2026 (or 2016, context helps). If it’s more than 4 years old, that’s another reason you’re reading this chart.

No label at all? Check your owner’s manual under “battery specifications” or “maintenance”, it will list the group size. If you don’t have the manual, most auto parts store websites let you look up by VIN or year/make/model and will show the group size the factory used. That’s the safest way to verify before you buy.

When to Replace vs Recharge

A battery that struggles to start your car on a 40-degree morning is not necessarily dead, it may just be discharged. A short drive and a quality battery charger can bring it back. A battery that fails a load test at full charge is done. The NOCO GENIUS10 10-Amp Smart Battery Charger (around $100) handles both jobs, a full recharge on a dead battery or long-term trickle maintenance on a car that sits.

The three-to-five-year rule holds for most flooded-cell batteries in moderate climates. AGM batteries often last five to seven years. Heat kills batteries faster than cold, Phoenix and Houston see more battery failures than Minneapolis, because high temperatures accelerate internal corrosion and water loss. If you’re in a hot climate, don’t wait for the battery to fail, replace it at four years regardless.

If you want a definitive answer before spending $150-250 on a new battery, take it to any auto parts store and ask for a free battery and charging system test. They’ll put a load tester on it in the parking lot. If it fails the load test, replace it. If it passes but won’t hold a charge, the alternator is more likely the issue.