Image Source: i.ytimg.com
How To Replace The Battery On A Jeep Key Dongle Step-By-Step
Can you replace the battery on a Jeep key dongle? Yes, absolutely! Replacing the battery in your Jeep key dongle is a straightforward process that most owners can accomplish themselves without needing to visit a dealership or a mechanic. This guide will walk you through the entire procedure, from identifying the correct battery type to successfully reopening your key fob.
Your Jeep’s key fob, also known as a key dongle or transmitter, is a marvel of modern convenience. It allows you to lock and unlock your doors, start your engine, and often activate your Jeep’s remote car starter with just the push of a button. However, like any electronic device powered by a battery, the Jeep key fob battery will eventually lose its charge and need replacing. Fortunately, a dead Jeep remote battery doesn’t mean an expensive replacement. Learning how to perform a Jeep key fob battery replacement yourself can save you time and money.
This in-depth guide will cover everything you need to know about keeping your Jeep keyless entry system powered up and functional. We’ll discuss the common Jeep key fob battery types, how to locate the battery within your specific fob, and the tools you might need for the job. Whether you’re dealing with a standard Jeep ignition key with integrated controls or a more advanced fob, this step-by-step process will help you get your Jeep remote working like new.
Pinpointing the Correct Jeep Key Fob Battery Type
One of the most crucial steps in a Jeep remote battery replacement is ensuring you have the correct battery. Using the wrong Jeep key fob battery type can lead to the fob not working, or worse, damage to the internal circuitry. Fortunately, Jeep key fobs typically use standard coin-cell batteries that are readily available at most convenience stores, supermarkets, and electronics retailers.
Common Jeep Key Fob Battery Sizes
The most common Jeep key fob battery size you’ll encounter is the CR2032. This is a 3-volt lithium coin cell battery, distinguished by its 20mm diameter and 3.2mm thickness. You’ll find this type in many Jeep models, including Wranglers, Cherokees, Grand Cherokees, and Patriots, across various model years.
However, it’s always wise to confirm the exact Jeep key fob battery size for your specific vehicle. Some older Jeep models or different key fob designs might utilize a different battery. You might find the CR2016 (also 3-volt, but thinner at 1.6mm) or, less commonly, the CR2450.
How to Confirm Your Jeep Key Fob Battery Type
There are several reliable ways to determine the exact Jeep key fob battery type you need:
- Check Your Owner’s Manual: This is the most definitive source. Your Jeep’s owner’s manual will clearly state the recommended battery type for your key fob.
- Inspect the Old Battery: Once you’ve opened your Jeep key fob, the battery type is usually printed directly on its casing. This is the easiest way to know for sure what you need to buy.
- Consult an Online Automotive Parts Retailer: Many websites allow you to input your Jeep’s year, make, and model to find compatible accessories, including key fob batteries.
- Visit a Jeep Dealership or Auto Parts Store: If you’re unsure, you can describe your key fob to an expert at these locations, and they can help you identify the correct battery.
Table 1: Common Jeep Key Fob Battery Types
| Battery Type | Voltage | Diameter (mm) | Thickness (mm) | Common Jeep Models (Examples) |
|---|---|---|---|---|
| CR2032 | 3V | 20 | 3.2 | Wrangler, Cherokee, Grand Cherokee, Patriot |
| CR2016 | 3V | 20 | 1.6 | Some older or specific fob designs |
| CR2450 | 3V | 24 | 5.0 | Less common, but possible in certain models |
Step-by-Step Guide: How To Replace The Battery On A Jeep Key Dongle
Now that you know how to identify the correct battery, let’s get to the core of the process: the actual Jeep remote battery replacement. This involves carefully opening the key fob, swapping the old battery for a new one, and reassembling the fob.
Tools You Might Need
Before you begin, gather these simple tools:
- A small, flat-head screwdriver or a plastic pry tool: This is essential for gently separating the two halves of the key fob. A plastic pry tool is preferable as it’s less likely to scratch or damage the fob’s casing.
- A new coin-cell battery: Ensure it’s the correct Jeep key fob battery type identified earlier.
- A clean, dry cloth: To wipe down the inside of the fob and the new battery if necessary.
How to Open Jeep Key Fob: Unveiling the Inner Workings
The process for how to open a Jeep key fob varies slightly depending on the specific design. However, most modern Jeep key fobs are designed to be opened with minimal effort.
For Key Fobs with a Visible Seam:
- Locate the Seam: Examine your Jeep key fob. You’ll typically find a thin seam running around the perimeter where the two plastic halves meet.
- Find the Notch: In most cases, there’s a small notch or indentation along this seam. This is where you’ll insert your tool.
- Gently Pry: Insert the tip of your small, flat-head screwdriver or plastic pry tool into the notch.
- Twist and Separate: Apply gentle pressure and twist the screwdriver or pry tool slightly. You should hear a faint click as the seam begins to separate. Work your way around the seam if necessary, using the tool to carefully pry the two halves apart. Be patient and avoid forcing it, as this can break the plastic clips holding the fob together.
For Key Fobs with a Detachable Back Cover:
Some Jeep key fobs, particularly those with an integrated emergency key, have a small release button or slider on the side.
- Locate the Release: Find the small button or slider.
- Press and Slide: Press this button or slide the release mechanism. This will typically detach the back cover of the key fob.
- Remove the Emergency Key: If your fob has a removable emergency key, you may need to slide it out first to access the battery compartment.
For Key Fobs with a Removable Metal Key (Integrated Ignition Key):
Many Jeep key fobs have a physical key that folds out. This key often acts as a lever to open the fob.
- Deploy the Metal Key: Press the release button on the side of your Jeep key fob to unfold the physical key.
- Locate the Prying Point: Look for a small slot or gap where the metal key inserts into the fob housing.
- Insert and Twist: Insert the end of the metal key into this slot and gently twist. This should pry the two halves of the fob apart.
Locating the Jeep Key Fob Battery
Once your Jeep key fob is open, you’ll see the internal components, including the circuit board and the battery.
- Jeep Key Fob Battery Location: The battery is usually a flat, circular coin. It’s typically held in place by a small clip or by the pressure of the fob’s housing.
- Note the Polarity: Pay close attention to which side of the battery is facing up. There will be a “+” symbol on one side, which is usually the positive terminal. You’ll need to replicate this orientation with the new battery.
Removing the Old Battery
- Gentle Leverage: If the battery is held by clips, you might be able to gently lift it out with your fingernail or the tip of your plastic pry tool.
- Avoid Metal Tools: Try not to use metal tools to pry the battery out, as you could accidentally short-circuit the components or scratch the battery contacts.
Installing the New Jeep Key Fob Battery
- Clean Contacts: Before installing the new battery, gently wipe the battery contacts inside the fob and the new battery itself with a clean, dry cloth. This ensures good electrical connection.
- Orient Correctly: Place the new battery into its compartment with the correct polarity (usually the “+” side facing upwards, matching the orientation of the old battery).
- Secure the Battery: Ensure the battery is seated firmly and any retaining clips are properly engaged.
Reassembling Your Jeep Key Fob
This is the reverse of the opening process.
- Align the Halves: Carefully align the two halves of the Jeep key fob casing.
- Snap Together: Gently press the two halves together. You should hear clicks as the internal clips engage.
- Ensure a Snug Fit: Work your way around the seam, pressing firmly to ensure there are no gaps. The fob should feel securely closed.
- Test the Fob: Once reassembled, test all the functions of your Jeep key fob. Try unlocking and locking your doors, and if your fob has a remote start function, test the Jeep remote car starter battery power.
Troubleshooting Common Issues After Battery Replacement
Sometimes, even after a successful battery replacement, your Jeep key fob might not work as expected. Here are a few common issues and their solutions:
-
Fob Not Responding:
- Check Battery Orientation: The most common culprit is an incorrectly installed battery. Double-check that the “+” side is facing the correct way.
- Dead New Battery: While rare, it’s possible you purchased a faulty new battery. Try a different brand or from a different store.
- Corroded Contacts: Ensure the metal contacts inside the fob are clean.
- Fob Damage: The fob itself might have suffered physical damage that prevents it from working.
-
Some Buttons Work, Others Don’t:
- This could indicate a faulty button on the circuit board or a slightly misaligned battery not making consistent contact with all terminals. Try re-opening and re-seating the battery.
-
Key Fob Still Not Working After Replacement:
- Reprogramming May Be Necessary: In some cases, especially if the battery has been dead for a long time or if the fob was dropped, it might need to be reprogrammed to your Jeep. Consult your owner’s manual or a Jeep dealership for reprogramming instructions. This is less common for a simple battery swap but can happen.
- Internal Circuitry Damage: If none of the above solutions work, the internal circuitry of the key fob might be damaged, requiring replacement of the entire fob.
Maintaining Your Jeep Key Fob
To ensure the longevity of your Jeep key fob and its battery, consider these maintenance tips:
- Use Quality Batteries: Opt for reputable brands for your Jeep key fob battery. While they might cost a little more, they often last longer and perform more reliably.
- Avoid Extreme Temperatures: Prolonged exposure to extreme heat or cold can degrade battery performance.
- Keep it Dry: Moisture can damage the electronic components. While most fobs are somewhat water-resistant, avoid submerging them.
- Handle with Care: Avoid dropping your key fob, as this can dislodge the battery or damage the internal circuitry.
- Regularly Check Fob Functionality: Periodically test all buttons on your Jeep key fob to catch battery issues early.
Frequently Asked Questions About Jeep Key Fob Batteries
Q1: How often do I need to replace my Jeep key fob battery?
A: The lifespan of a Jeep key fob battery typically ranges from 2 to 5 years, depending on usage and battery quality. If you notice your key fob’s range decreasing or it stops working altogether, it’s time for a replacement.
Q2: Can I use a rechargeable battery in my Jeep key fob?
A: It is generally not recommended to use rechargeable batteries in Jeep key fobs or most other electronic devices that are designed for non-rechargeable coin cells. Rechargeable batteries can have different voltage outputs or physical dimensions that are not compatible and could potentially damage the fob’s electronics. Stick to the specified non-rechargeable battery type.
Q3: My Jeep key fob has two buttons. Does it use a different battery than a three-button fob?
A: The number of buttons on a Jeep key fob does not necessarily dictate a different battery type. The battery type is primarily determined by the internal circuitry and power requirements of the transmitter, which can vary more by the Jeep model and year than by the number of functions on the fob. Always confirm the specific Jeep key fob battery type for your vehicle.
Q4: What is the Jeep ignition key battery?
A: The term “Jeep ignition key battery” is essentially another way of referring to the Jeep key fob battery. The key fob often contains the mechanism to start your Jeep’s ignition remotely or to allow keyless ignition entry. Therefore, the battery powering the fob is crucial for the ignition system’s convenience features.
Q5: My Jeep has a remote car starter. Is the Jeep remote car starter battery the same as the key fob battery?
A: Yes, in most Jeep models that feature an integrated remote car starter function within the primary key fob, the Jeep remote car starter battery is the same battery that powers all other functions of the fob. Replacing the standard Jeep key fob battery will restore functionality to the remote start feature as well.
Replacing the battery on your Jeep key dongle is a simple yet essential maintenance task. By following these detailed steps, you can ensure your keyless entry system remains operational, providing you with the convenience and security your Jeep offers. Remember to always use the correct Jeep key fob battery type and handle your fob with care for a smooth and successful replacement.