Losing power in your 2020 Jeep Wrangler key fob can be stressful—especially when you’re heading out and your vehicle won’t unlock. The good news? Changing the battery is simple, quick, and doesn’t require a dealership visit. This guide walks you through each step, helps you avoid common mistakes, and shares tips to keep your key fob working longer. Whether you’re a first-timer or just want a refresher, you’ll find everything you need right here.
Why Change The Key Fob Battery?
A weak or dead battery in your key fob means your Jeep Wrangler may not unlock, start, or respond. Typical signs include:
- Reduced range (you must get closer to the Jeep to unlock)
- Delayed response when pressing buttons
- Complete failure to work
Replacing the battery quickly keeps you from getting locked out and avoids extra costs at the dealership.
What You’ll Need
Changing the battery is easier with the right tools. Gather these items before you start:
- CR2450 battery (most 2020 Jeep Wrangler key fobs use this type)
- Small flat-head screwdriver or plastic pry tool
- Clean cloth (optional, for cleaning inside the fob)
Where To Buy The Battery
You can find CR2450 batteries at most electronics stores, supermarkets, or online. Always choose a reliable brand to ensure longer life and avoid leaks.
Step-by-step: How To Change Battery In 2020 Jeep Wrangler Key Fob
Follow these steps for a smooth battery replacement:
- Remove the Key from the Fob
- Slide the release button on the back of your key fob.
- Pull out the mechanical key.
- Open the Key Fob
- Look for a small notch or seam along the edge of the fob.
- Insert the flat-head screwdriver or plastic pry tool gently into the notch.
- Twist the tool to separate the two halves. Be careful not to use too much force.
- Take Out the Old Battery
- Note the position of the battery (positive side up or down).
- Use the tool to carefully lift out the old battery.
- Dispose of the old battery properly—never throw it in the trash.
- Insert the New Battery
- Place the new CR2450 battery in the same orientation as the old one.
- Press down gently so it sits firmly in place.
- Reassemble the Key Fob
- Line up the two halves of the key fob.
- Press them together until you hear a click.
- Slide the mechanical key back into place.
- Test the Key Fob
- Stand near your Jeep and press the unlock or lock button.
- If it works instantly, you did everything right. If not, check the battery orientation and try again.
Comparison: Cr2450 Vs. Other Key Fob Batteries
Here’s how the CR2450 compares to other common key fob batteries:
| Battery Type | Diameter | Thickness | Typical Lifespan |
|---|---|---|---|
| CR2450 | 24 mm | 5.0 mm | 2–3 years |
| CR2032 | 20 mm | 3.2 mm | 1–2 years |
| CR2025 | 20 mm | 2.5 mm | 1–2 years |
The CR2450 is thicker and lasts longer, which is why Jeep uses it for the Wrangler.
Tips For A Trouble-free Battery Change
- Handle the circuit board carefully: Avoid touching it with your fingers to prevent static damage.
- Clean inside: Use a dry cloth to wipe any dust before closing the fob.
- Check the seal: Make sure the fob snaps tightly closed to keep out moisture.
- Use the correct battery: Wrong size can damage your fob or cause it to malfunction.
Common Mistakes To Avoid
Many people make simple errors when changing the battery. Here are a few to watch out for:
- Forcing the fob open: This can crack the plastic. Use gentle pressure and find the right notch.
- Wrong battery orientation: Always check which side faces up before removing the old battery.
- Touching the battery contacts: Oils from your skin can reduce connection quality.
- Not testing before reassembly: If you test before snapping it closed, you can fix issues more easily.
How Often Should You Replace The Battery?
Most key fob batteries last 2-3 years. If you use your fob often or in extreme temperatures, you might need to replace it sooner. Some owners change the battery every two years to avoid surprises.
Key Fob Functions After Battery Change
After battery replacement, your 2020 Jeep Wrangler key fob should work as before:
- Unlock/lock doors
- Remote start (if equipped)
- Panic alarm
- Trunk release
If any function fails, recheck the battery placement. In rare cases, you may need to reprogram the fob, but this is uncommon for simple battery swaps.
Quick Reference: Battery Replacement Steps
Here’s a summary of the process:
| Step | Action |
|---|---|
| 1 | Remove mechanical key |
| 2 | Open key fob case |
| 3 | Take out old battery |
| 4 | Insert new CR2450 battery |
| 5 | Reassemble and test |
This table helps you check your progress at a glance.
Where To Find More Information
For more details about your specific Jeep model and official instructions, see the Jeep Owner’s Site.
Frequently Asked Questions
How Do I Know If My 2020 Jeep Wrangler Key Fob Battery Is Low?
You may notice a warning message on your dashboard, reduced range, or that your fob isn’t working every time. Replace the battery if you see these signs.
What Type Of Battery Does The Key Fob Use?
Most 2020 Jeep Wrangler key fobs use a CR2450 lithium coin cell. Always check your owner’s manual to confirm.
Can I Use A Different Battery Type If Cr2450 Is Not Available?
No, only use a CR2450 battery. Other sizes may not fit or could damage your key fob.
Do I Need To Reprogram The Key Fob After Changing The Battery?
Usually not. Replacing the battery does not erase programming.
If the fob still doesn’t work, check the battery orientation or try a second new battery.
What Should I Do If The Key Fob Still Does Not Work After Battery Replacement?
Double-check the battery position, ensure the fob is snapped together, and that the contacts are clean. If it still fails, consult your dealer or a locksmith.
Changing the battery in your 2020 Jeep Wrangler key fob is a quick task that can save you time and money. With a few tools and careful steps, you’ll have your fob working like new no dealership visit needed.
