If you have a Jeep Wrangler JK, its battery size is BCI (Battery Council International) group code 34 for model years 2007 to 2011 and DIN (German International Standard) H6 for model years 2012 to 2018.

A car’s battery will usually last about three to five years depending on usage, so if you have a Jeep JK, it’s likely that you’re due for a new battery or have already had to change it at least once before.

Let’s take a closer look to help you find the best fit for your Jeep JK battery replacement.

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How big is a Jeep JK battery?

Jeep models are compatible with a variety of battery sizes. In fact, even different

Jeep Wrangler

models have different-sized batteries.

If you’re looking for the tried-and-true method to learn the correct battery size for your Jeep JK, the answer is to check your owner’s manual. This invaluable marvel of literature contains answers to almost all your vehicle-related questions!

Don’t have access to your manual? Take a look at the battery currently installed in your Wrangler. Just pop the hood and read the battery label to find information on its size and cold cranking amps (CCA).

Even easier, head to

AutoZone.com

. The auto part dealer’s site has a tool that searches for parts based on your specific vehicle, right down to the year, make, model, trim, and engine!

Now, let’s take a look at what battery size you need for specific Jeep JK models.

2007-2011 Jeep JK battery size

The battery size on the earlier third-generation Jeep JK models (years 2007 to 2011) is a BCI (Battery Council International) group 34. Its dimensions are 10 1/4 x 6 13/16 x 7 7/8 (L x W x H) inches. Any Jeep Wrangler JK from model years 2007 to 2011 has this battery size.

However, group 75 batteries will also fit. Note that batteries with higher cold cranking amps (CCA) will offer better performance but will also likely cost more.

Here are some batteries that will fit your 2007 to 2011 Jeep JK:

Duralast 34-DL 700 CCA (exact fit)

ACDelco Advantage 34S 685 CCA

Valucraft 34-VL 600 CCA

Valucraft 75DT-VL 650 CCA

Optima AGM Red Top 34 800 CCA

Odyssey 34-790 792 CCA

2012-2018 Jeep JK battery size

For the 2012 model year, the Jeep JK Wrangler got a new 3.6-liter Pentastar V6 engine that replaced the previous 3.8-liter EGH V6. With this new powertrain came a new battery. This battery size is DIN H6, which is the same as BCI group sizes 48 and is common in recent Jeep models. H6 batteries are 12 1/16 x 6 7/8 x 7 9/16 inches.

Here are some batteries that will fit a third-generation Jeep JK with the 3.6-liter V6:

Duralast Platinum H6-EFB 750 CCA

Duralast H6-DL 680 CCA (exact fit)

ACDelco Advantage 48S 680 CCA

Optima AGM Yellow Top DH6 800 CCA

Odyssey 48-720T 723 CCA

Econocraft H6-E 615 CCA

Pro Tip Jeep started using H7 batteries in some 2016 to 2018 Wrangler models. If you have a Jeep JK from one of these model years, make sure to check whether you have an H6 or H7 battery.

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Jeep JK battery life

The battery in your gas-powered car shouldn’t need to be manually charged very often because it is charged by the engine as you drive.

Unfortunately, rechargeable batteries don’t last forever—eventually, they’ll degrade. Your smartphone battery is a great example of this. This is why experts recommend changing your car battery every four to five years. Keep in mind that driving habits and conditions will affect the life expectancy of your battery.

It’s a smart idea to regularly test your car battery. There’s nothing worse than realizing too late that your battery isn’t holding a charge anymore! If you’re noticing any of these things, they could be signs of battery failure:

Clicking sounds when you start the vehicle

Visible corrosion on the battery

Constantly having to

jumpstart

or charge the battery

Dim headlights or other electronic malfunctions

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How to keep your Jeep JK battery healthy

Regular tests will help you know when a battery could be due for a change, but here’s how you can extend the life of your Jeep’s battery:

Don’t leave your car sitting for too long. Driving is what recharges your battery. So if you don’t drive at least every once in a while, you could come back to a car that won’t start.

Manually recharge the battery after long periods of not driving. If you’re leaving your Wrangler in storage for a season, take it out and give it a charge with a manual car battery charger before the next time you drive.

Don’t leave your lights on. This is fairly self-explanatory.

Disconnect electronics when you turn your car off. Some electronics might still be draining your battery even when the car isn’t on. This includes charging cords that aren’t even charging anything!

Stick to your manufacturer's recommended

car maintenance schedule

. This is a surefire way to make sure one mechanical issue doesn’t snowball into other issues.

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