Ever found yourself staring under the hood of your modern Jeep Cherokee, wondering why things look a little different than the old days? You’re not alone. With advanced features like Engine Stop-Start (ESS) technology becoming standard, the electrical systems in our vehicles have grown more complex.
Many Jeep owners, especially those new to newer models, often ask: how many batteries does a 2020 Jeep Cherokee have? It’s a great question, and the answer isn’t always as simple as “one.”
At FatBoysOffroad, we understand the confusion. We’re here to cut through the noise and give you the definitive, practical guide to your 2020 Cherokee’s power setup. You’ll learn exactly how many batteries your Jeep uses, where they’re located, how to maintain them, and what to do when it’s time for a replacement or an upgrade for your off-road adventures.
Let’s get powered up and dig into the details!
Understanding the 2020 Jeep Cherokee’s Start/Stop System
The 2020 Jeep Cherokee, like many contemporary vehicles, incorporates an Engine Stop-Start (ESS) system. This technology is designed to improve fuel efficiency and reduce emissions by shutting off the engine when the vehicle comes to a complete stop, such as at a traffic light.
When you release the brake pedal, the engine seamlessly restarts. This constant stopping and starting places a significant demand on the vehicle’s electrical system.
A traditional single battery simply isn’t robust enough to handle these repeated high-current draws without premature wear. This is precisely why a more sophisticated battery arrangement is necessary.
The ESS system requires dedicated power to operate accessories like the radio, climate control, and lights while the engine is temporarily off. It also needs a quick, powerful burst of energy to restart the engine smoothly.
So, How Many Batteries Does a 2020 Jeep Cherokee Have, Really?
The straightforward answer to “how many batteries does a 2020 Jeep Cherokee have?” is typically two. This dual-battery setup is crucial for supporting the Engine Stop-Start (ESS) system and ensuring reliable operation.
You’ll find two distinct batteries working in harmony within your Cherokee. Each serves a specific, vital role in keeping your vehicle running efficiently and reliably.
The Main Starting Battery
This is the primary battery you’re likely familiar with. It’s responsible for providing the large jolt of power needed to crank the engine and get it running. It also powers most of the vehicle’s electrical components when the engine is on.
For the 2020 Jeep Cherokee, this main battery is typically a Group 48 AGM (Absorbed Glass Mat) battery. AGM batteries are preferred for modern vehicles due to their robust construction, better vibration resistance, and ability to handle deeper discharge cycles compared to traditional flooded lead-acid batteries.
They are also sealed, making them maintenance-free and less prone to leaks, which is a big plus for off-roaders.
The Auxiliary (ESS) Battery
The second battery, often referred to as the auxiliary or ESS battery, is smaller and plays a specialized role. Its primary function is to power the vehicle’s accessories and maintain critical electrical functions during the “stop” phase of the ESS system.
This ensures your radio stays on, the AC continues to blow, and navigation systems remain active while the engine is temporarily off. When the engine needs to restart, the auxiliary battery also provides a dedicated burst of power to the starter motor, ensuring a smooth and rapid transition.
This prevents the main battery from being constantly drained by the ESS system, extending its lifespan. The auxiliary battery is also typically an AGM type, designed for deep cycling and quick recharges.
Locating and Identifying Your Cherokee’s Batteries
Knowing where to find your batteries is the first step in proper maintenance and troubleshooting. The locations can vary slightly based on the specific trim level and optional equipment, but generally, they are in these spots:
Main Battery Location
The main starting battery in your 2020 Jeep Cherokee is usually located in the traditional spot: under the hood. You’ll find it on the passenger side, often beneath a plastic cover or shield designed to protect it from engine heat and debris.
Accessing it typically involves unlatching a few clips or removing a couple of screws. Always make sure the engine is off and cool before attempting to access any components under the hood.
Auxiliary Battery Location
The auxiliary battery is a bit more hidden. Its location can vary, but common spots for the 2020 Jeep Cherokee include:
- Under the passenger seat: Some models house it beneath the passenger seat, requiring removal of trim pieces or even the seat itself to access.
- In the rear cargo area: It might be located in a compartment in the floor of the trunk or cargo area, often under a removable panel.
- Behind the passenger front fender: This is a common location, necessitating removal of the inner fender liner to gain access.
Always consult your owner’s manual for the precise location of both batteries in your specific 2020 Jeep Cherokee model. This will save you time and prevent unnecessary disassembly.
Maintaining Your Cherokee’s Dual Battery Setup
Proper maintenance is key to extending the life of both your main and auxiliary batteries. Ignoring them can lead to unexpected breakdowns, especially when you’re far from civilization.
Regular Inspection and Cleaning
Periodically check both batteries for signs of corrosion around the terminals. Corrosion looks like a white or bluish powdery substance. Use a wire brush and a battery terminal cleaner solution (or a baking soda and water mixture) to clean any buildup.
Ensure the battery terminals are tight and secure. Loose connections can lead to poor charging and starting issues.
Testing Battery Health
A simple voltmeter can give you a quick health check. A fully charged 12V battery should read around 12.6-12.8 volts when the engine is off. Readings below 12.4V suggest the battery is losing charge or starting to weaken.
For a more thorough assessment, especially for AGM batteries, consider using a dedicated battery load tester. This tool simulates a starting load and can identify a weak battery before it leaves you stranded.
Remember to test both the main and auxiliary batteries independently to get an accurate picture of your electrical system’s health.
Keeping Batteries Charged
If your Cherokee sits for extended periods, or if you primarily do short drives, your batteries might not get a full charge from the alternator. This is particularly true for the auxiliary battery.
Consider using a smart battery tender or trickle charger. These devices can maintain a healthy charge without overcharging, extending battery life. Connect it to your main battery, and it will often charge the auxiliary battery as well, though checking your owner’s manual for specific charging recommendations is always a good idea.
When to Replace Your 2020 Jeep Cherokee Batteries
Batteries don’t last forever. Even with the best care, they will eventually need replacement. For a dual-battery system, understanding the signs and replacement process is crucial.
Signs of a Failing Battery
Watch out for these indicators:
- Slow Engine Cranking: If the engine turns over sluggishly, especially on cold mornings, your main battery is likely weakening.
- Flickering Lights or Dim Accessories: This can indicate a struggling auxiliary battery or a general issue with the charging system.
- Frequent ESS Malfunctions: If your Engine Stop-Start system isn’t engaging as it should, or if you get “ESS Unavailable” messages, the auxiliary battery is often the culprit.
- Battery Warning Light: A dedicated battery light on your dashboard is a clear sign of a problem.
- Swollen Battery Case: A visible bulge on the battery case is a dangerous sign of internal damage and requires immediate replacement.
DIY Replacement Tips (Safety First!)
Replacing batteries can be a DIY task, but it requires caution. Always wear safety glasses and gloves. Ensure your vehicle is off and the parking brake is engaged.
Disconnect the negative (-) terminal first, then the positive (+).
This prevents accidental short circuits. When installing, connect the positive (+) terminal first, then the negative (-).
It’s generally recommended to replace both batteries at the same time, especially if they are of similar age. This ensures optimal performance of the ESS system and prevents an older, weaker battery from prematurely stressing a new one. Always use AGM batteries that match the original specifications for your 2020 Jeep Cherokee.
Some modern vehicles, including certain Jeep models, may require a battery registration process with the vehicle’s computer after replacement. This helps the vehicle manage the charging system efficiently. While often not strictly necessary for basic function, it can optimize battery life. If you’re unsure, consult a professional.
Troubleshooting Common Battery Issues in Your Cherokee
Even with two batteries, issues can arise. Knowing how to diagnose them can save you a tow bill.
“ESS Unavailable” Message
This is one of the most common complaints related to the dual battery system. If your ESS system isn’t working, the auxiliary battery is often the primary suspect. Other factors can also contribute, such as:
- Low ambient temperature.
- Engine not at operating temperature.
- Low main battery charge.
- Climate control settings demanding high power.
- Recent heavy electrical load (e.g., winching).
Test both batteries. If the auxiliary battery tests weak, replace it. If both are good, consider if one of the environmental factors is at play.
Parasitic Draw
A parasitic draw occurs when something in your vehicle continues to pull power even when the engine is off. This can slowly drain your batteries, especially if the vehicle sits for days.
Diagnosing a parasitic draw requires a multimeter and some patience. You’ll disconnect the negative terminal and connect the multimeter in series to measure current draw. Then, you’ll systematically pull fuses to isolate the circuit causing the drain.
Common culprits include aftermarket accessories, faulty relays, or interior lights left on.
Jump-Starting Your 2020 Jeep Cherokee
If your main battery is dead, you can jump-start your Cherokee. Locate the positive (+) and negative (-) terminals on the main battery under the hood. Connect the positive cable to the dead battery’s positive terminal, then to the good battery’s positive terminal.
Connect the negative cable to the good battery’s negative terminal, then to a good ground point on the dead vehicle’s engine block or chassis (not directly to the dead battery’s negative terminal). This helps prevent sparks near battery gases. Once started, remove cables in reverse order.
Never attempt to jump-start the auxiliary battery directly, as it’s not designed for that high current draw.
Off-Road Power Management: Beyond the Stock Setup
For the serious off-roader, knowing how many batteries does a 2020 Jeep Cherokee have is just the start. Your stock dual-battery system is great for daily driving and light trail use, but heavy off-road demands can push it to its limits.
Winching and High-Draw Accessories
Operating a powerful winch, running a large fridge/freezer, or powering extensive auxiliary lighting places immense stress on your electrical system. While your main battery can handle short bursts, sustained high draws can rapidly deplete it.
Consider upgrading to a dedicated deep-cycle battery for these accessories, managed by a smart dual battery isolator or DC-to-DC charger. This setup ensures your starting battery remains fully charged for engine restarts.
Solar Charging and Off-Grid Power
When camping or overlanding, a portable solar panel can be a game-changer. These panels, paired with a solar charge controller, can top off your auxiliary or dedicated deep-cycle battery, keeping your fridge cold and your devices charged without needing to run your engine.
This is especially useful for longer stays in remote areas where reliable power sources are scarce. Remember to factor in the charging capacity needed for all your devices.
Safety on the Trail
Always carry a good quality jump starter pack or heavy-duty jumper cables when off-roading. A dead battery in the middle of nowhere is no fun. Consider a spare battery for your dedicated accessory setup if you’re venturing far off the beaten path.
When working with any electrical system in the field, always prioritize safety. Disconnect power sources when necessary, and be mindful of exposed terminals. If you’re unsure, it’s always best to seek assistance from experienced adventurers or a qualified professional.
Frequently Asked Questions About 2020 Jeep Cherokee Batteries
Can I replace just one of the batteries in my 2020 Jeep Cherokee?
While technically possible, it’s generally recommended to replace both the main and auxiliary batteries at the same time. If one battery is failing, the other is likely not far behind. A weak older battery can also put undue stress on a new one, shortening its lifespan and affecting the ESS system’s performance.
What type of batteries does a 2020 Jeep Cherokee use?
Both the main and auxiliary batteries in a 2020 Jeep Cherokee are typically AGM (Absorbed Glass Mat) batteries. These are specifically designed to handle the demands of modern vehicles with Engine Stop-Start (ESS) systems due to their superior cycling capabilities and vibration resistance.
Why does my 2020 Jeep Cherokee have two batteries?
Your 2020 Jeep Cherokee has two batteries primarily to support the Engine Stop-Start (ESS) system. The main battery starts the engine, while the smaller auxiliary battery powers accessories and ensures a smooth restart when the ESS system temporarily shuts off the engine at stops, reducing wear on the main battery.
How long do the batteries in a 2020 Jeep Cherokee typically last?
Battery life can vary significantly based on climate, driving habits, and maintenance. On average, you can expect the original batteries in a 2020 Jeep Cherokee to last anywhere from 3 to 5 years. Regular testing and maintenance can help maximize their lifespan.
Is it safe to jump-start a 2020 Jeep Cherokee with a dead auxiliary battery?
No, you should never attempt to jump-start the auxiliary battery directly. The auxiliary battery is not designed for the high current draw of a jump-start. If your main battery is dead, you can jump-start it using the terminals under the hood. If the auxiliary battery is failing, it needs to be replaced.
Power Up Your Knowledge, Power Up Your Jeep!
Navigating the intricacies of your 2020 Jeep Cherokee’s electrical system doesn’t have to be a mystery. By understanding that your vehicle relies on a sophisticated dual-battery setup, you’re better equipped to maintain it, troubleshoot issues, and ensure reliable performance, whether you’re commuting to work or tackling challenging trails.
Remember, the answer to how many batteries does a 2020 Jeep Cherokee have is a vital piece of information for any DIY mechanic or off-road enthusiast. Keep those terminals clean, check those voltage readings, and replace your batteries proactively to avoid getting stranded.
Stay informed, stay prepared, and keep those wheels turning!
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