Jeep Grand Cherokee Battery Size: A Comprehensive Guide
Are you wondering what size battery your Jeep Grand Cherokee needs? With different battery requirements across models and engine options, it can get confusing. This comprehensive guide covers everything you need to know about Jeep Grand Cherokee battery sizes, specs, replacement, and maintenance. Read on to learn how to choose the right battery for your Jeep and keep its electrical system running optimally.
Table of Contents
Introduction
The battery is the heart of your vehicle’s electrical system. Without sufficient cranking power from a properly sized battery, your Jeep Grand Cherokee won’t start or run all the electronics. From the base models to the high-performance SRT and 4xe plug-in hybrid, the battery size and requirements vary significantly.
This article provides a detailed overview of the battery specifics for each Jeep Grand Cherokee generation and trim level. We’ll cover battery locations, group sizes, Cold Cranking Amps (CCA), steps for safe testing and replacement, top-rated replacement options, and tips for extending battery life. Read on to learn how to choose the optimal battery for your Jeep and keep it running in tip-top shape.
Jeep Grand Cherokee Battery Size by Year and Model
The battery size your Jeep Grand Cherokee requires depends primarily on the model year and engine. Here are the specifications by generation and trim level:
1993-1998 Jeep Grand Cherokee
The first generation Jeep Grand Cherokee from 1993 to 1998 used the following battery sizes:
- Base models with 4.0L I6 engine: Group 65 battery
- 5.2L V8 models: Group 78 battery
- 5.9L V8 models: Group 78 battery
1999–2004 Jeep Grand Cherokee
The second generation Grand Cherokee switched to larger capacity batteries:
- 4.0L I6 models: Group 65 or 75 battery
- 4.7L V8 models: Group 78 battery
2005–2010 Jeep Grand Cherokee
The third generation WK Grand Cherokee came with several engine options:
- 3.7L V6: Group 65 battery
- 4.7L V8: Group 78 battery
- 5.7L Hemi V8: Group 78 battery
- SRT8 6.1L Hemi V8: Group 78 battery
2011–2020 Jeep Grand Cherokee
The fourth and fifth generation WK2 Grand Cherokee saw expanded powertrain choices:
- 3.6L V6 Pentastar: Group 65 battery
- 5.7L Hemi V8: Group 78 battery
- 6.4L Hemi V8: Group 78 battery
- 3.0L EcoDiesel V6: Group 78 battery
- SRT 6.4L Hemi V8: Upgraded Group 78 battery
- Trackhawk 6.2L Supercharged V8: Upgraded Group 78 battery
2022–2023 Jeep Grand Cherokee And Grand Cherokee L
The latest WL generation comes with several engine and battery options:
- 3.6L Pentastar V6: Group 65 battery
- 5.7L Hemi V8: Group 78 battery
- 4xe plug-in hybrid: Group 65 battery plus high voltage lithium-ion battery pack
As you can see, the battery group size correlates closely with the engine. The optional V8 motors require a larger Group 78 battery to provide sufficient cold cranking amps.
Factory Jeep Grand Cherokee Battery Specifications
In addition to the physical group size, the electrical ratings like CCA and reserve capacity are important. Here are the typical specs for factory installed Jeep Grand Cherokee batteries:
Group 65 batteries:
- 500-600 cold cranking amps
- 80-90 minute reserve capacity
Group 78 batteries:
- 700-800 cold cranking amps
- 100-110 minute reserve capacity
Higher performance SRT and Trackhawk models may come with upgraded Group 78 batteries pushing 800+ CCA and 120+ reserve capacity.
The 4xe plug-in hybrid models also require a robust 12V battery to complement the high voltage lithium-ion battery pack.
Locating the Jeep Grand Cherokee Battery
Before you can test, charge or replace your Jeep’s battery, you’ll need to access the terminals. Here is where to find the battery:
1993-2004 Jeep Grand Cherokee: The battery is located under the front passenger seat. You’ll need to remove the seat to access it.
2005-2021 Jeep Grand Cherokee: The battery is mounted in the front right of the engine bay. No need to remove seats.
2022+ Jeep Grand Cherokee/WL: The battery remains in the front right fender well.
The 4xe models have the 12V battery up front plus the high voltage battery pack mounted at the rear axle.
Once you’ve located the battery, follow all safety precautions. Wear protective eyewear and gloves when working around the battery.
When to Replace the Jeep Grand Cherokee Battery
The average battery lifespan is 3-5 years, but heat, cold weather, and heavy electrical loads can shorten service life. Here are signs your Jeep’s battery needs replacement:
- Difficulty starting or sluggish cranking
- Dimming headlights at idle
- Battery tester shows low state of charge
- Corroded or damaged terminals
- Cracked or bulging battery case
We recommend having your Jeep’s battery tested annually once it is 3 years old. This allows you to replace it proactively instead of getting stranded with a dead battery.
Choosing the Right Replacement Jeep Grand Cherokee Battery
When it’s time for a new battery, choose a replacement with the same group size, CCA, and reserve capacity as the factory battery. Top recommendations include:
Group 65 batteries:
- Optima RedTop
- Odyssey PC680
- AC Delco Gold
Group 78 batteries:
- Optima YellowTop
- Odyssey PC925
- Delphi MaxStart
For the 4xe hybrid, stick with the factory 12V battery spec. The high voltage battery pack should only be serviced by a dealer.
While you can save money on economy batteries, paying a little more for premium brands can extend replacement intervals. Avoid no-name discount batteries with exaggerated CCA ratings.
Step-by-Step Jeep Grand Cherokee Battery Replacement
Once you’ve got the right new battery in hand, here are the steps for safe DIY installation:
Disconnect the old battery
- Turn off all accessories and the ignition.
- Disconnect the negative (-) cable first, then positive (+).
- Remove any battery hold-down bolts or brackets.
- Carefully remove the battery from the vehicle.
Install the new battery
- Set the replacement battery in the tray and reinstall any hold-downs.
- Attach the positive cable first, then the negative.
- Coat the terminals with dielectric grease.
- Reset any error codes with a scan tool.
- Test electronics like radio presets.
With some care and patience, you can swap the battery yourself and save on labor costs. Just don’t rush and wear proper safety gear.
Charging and Maintaining Your Jeep Battery
To get the longest life from your Jeep’s battery:
- Use a trickle charger or maintainer when storing.
- Check terminals regularly for corrosion.
- Clean terminals with a wire brush and baking soda/water solution.
- Re-tighten connections to proper torque.
- Consider having the charging system tested annually.
Avoid overcharging, overheating, or excessive discharge which can damage plates and separators. Track battery usage and charging trends with a connected scan tool.
Extending the Life of Your Jeep Grand Cherokee Battery
You can maximize the lifespan of your new or replacement Jeep battery with proper care:
- Maintain an adequate state of charge. Don’t let the battery drain below 50%.
- Limit use of current-hungry accessories.
- Disconnect or use a battery disconnect switch during long-term storage. This prevents parasitic drain.
- In cold weather, keep the battery fully charged to prevent freezing.
- Avoid overcharging which can warp plates and cause shedding.
- Watch for signs of impending failure like slow cranking or acid leaks.
With smart charging habits and attentive preventive maintenance, your Jeep battery can easily exceed five years of service life.
The Jeep Grand Cherokee 4xe Hybrid Electrical System
The latest generation Grand Cherokee 4xe plug-in hybrid models combine a 2.0L turbocharged engine and a permanent magnet synchronous motor. Here are key points on the electrical system:
- 400V lithium-ion 17 kWh battery pack provides 25-mile all electric range and 470-mile combined driving range
- Pack is recharged via plug-in or regenerative braking.
- 12V auxiliary battery and charging system operate accessories.
- Maximize MPG by depleting EV battery charge before engine activates.
- Only have high voltage battery serviced by dealer technicians.
- The 4xe models offer three driving modes: Hybrid, Electric, or eSave
- The 4xe models have a 375 horsepower and 470 pound-feet of torque output
The 4xe provides impressive capability and efficiency. Just be sure to maintain both battery systems properly.
Frequently Asked Jeep Grand Cherokee Battery Questions
Here are answers to some common questions about Jeep Grand Cherokee batteries:
What causes a Jeep battery to die suddenly?
If a Jeep battery dies without warning, common causes are failed alternator not recharging, battery terminal corrosion increasing resistance, or accidental parasitic drain left on.
How can I tell if my Jeep Grand Cherokee needs a new battery?
Signs like difficult cold starting, dimming headlights, warning light, failed battery tester result, or presence of a rotten egg odor all indicate a worn out battery needing replacement.
What size battery does a Jeep Grand Cherokee need?
The battery size depends on model year and engine. Most use a Group 65 or Group 78. Verify specs before purchasing a replacement.
Can I upgrade my Jeep Grand Cherokee battery?
You can upgrade to a higher CCA and capacity battery as long as it fits the same group size tray. Just be sure it doesn’t exceed maximum length and width.
Is an AGM battery better for my Jeep?
Yes, upgrading to an absorbed glass mat (AGM) battery like the Optima RedTop provides extra cranking power and longevity. Just expect to pay a higher cost.
Conclusion
We hope this guide has helped demystify Jeep Grand Cherokee battery sizes, specifications, and replacement. The right battery provides reliable starting and powers all of your vehicle‘s electronics. Take time to learn your Jeep’s battery requirements and follow a proactive maintenance plan. With proper care and charging habits, your battery can deliver years of trouble-free performance.
