Swap the 2020 Hyundai Elantra key fob battery by removing the key, popping open the fob, and replacing the old CR2032 3V battery. It lasts 2-3 years and offers solid security. While CR2025 and CR2016 are options, they might not fit well or last as long. If the range reduces or response lags, it’s time for a new battery. Go for trusted brands like Energizer for the best results.
What Type of Battery Does a 2020 Hyundai Elantra Key Fob Use?
The 2020 Hyundai Elantra key fob uses a CR2032 3V lithium coin cell battery.
You’ll find this standard in most models, but if needed, CR2025 and CR2016 are compatible alternatives.
For the best performance, consider using reliable brands like Energizer or Panasonic, which offer varying prices and lifespans to suit your needs.
Battery Specifications
A 2020 Hyundai Elantra key fob uses a CR2032 3V lithium coin battery.
This standard battery fits most models and lasts about 2–3 years.
Alternatives include:
- CR2025: Thinner, may fit less securely.
- CR2016: Thinner, less capacity, may need frequent changes.
- CR2032: Best for reliability.
Check the vehicle manual for compatibility.
Battery Brand Options
The Hyundai Elantra key fob uses a CR2032 battery. Alternatives include CR2025 and CR2016, which are thinner but less durable. Battery brands vary:
| Brand | Lifespan | Price |
|---|---|---|
| Energizer | 3–4 years | $3–$5 |
| Panasonic | 2–3 years | $2–$4 |
| Duracell | 2–3 years | $3–$6 |
| Amazon Basics | 1.5–2 years | $1–$3 |
Energizer is recommended.
How Do You Change the Battery in a 2020 Elantra Key Fob?
To change the battery in your 2020 Elantra key fob, you’ll need a small flathead screwdriver and a CR2032 battery.
Start by pressing the release button to remove the metal key, then use the screwdriver to open the fob.
Remember to insert the new battery with the “+” side facing down before snapping the fob back together.
Step-by-Step Guide
Change the battery in a 2020 Hyundai Elantra key fob: Remove key, open fob, replace battery, reassemble.
1. Remove the key: Press the release button on the side and pull out the metal key.
2. Open the fob: Use a flathead screwdriver to gently pry the halves apart at the seam near the key slot.
3. Replace the battery: Take out the old CR2032 battery, noting its orientation.
Insert the new battery with the positive side facing down.
4. Reassemble the fob: Snap the halves back together and reinsert the metal key.
Dispose of the old battery responsibly, considering recycling for environmental safety.
Required Tools
Use a small flathead screwdriver or a coin and replace the battery with a CR2032 for your 2020 Hyundai Elantra key fob.
Steps and Tools:
- Small Flathead Screwdriver or Coin: Open the key fob gently.
- CR2032 Battery: A 3V lithium coin cell.
- Clean, Dry Workspace: Prevents static and losing parts.
These tools help maintain your key fob’s condition and function.
How Long Does a 2020 Elantra Key Fob Battery Last?
A 2020 Elantra key fob battery typically lasts 2 to 3 years under normal use.
Usage patterns and other factors like high usage, extreme temperatures, and proximity to the car can significantly impact battery life.
If you frequently lock and unlock your car, expect the battery to drain faster, possibly lasting just 1 to 1.5 years.
Battery Life Factors
A 2020 Hyundai Elantra key fob battery lasts about 2 to 3 years.
Factors like extreme temperatures, keeping the fob close to the car, and battery brand can affect its lifespan.
Store your fob in a moderate climate, at least 10 feet from the vehicle, and choose a reliable battery brand like Energizer for longer life.
Usage Patterns
A 2020 Hyundai Elantra key fob battery lasts 2-3 years with normal use. Heavy use (10+ clicks a day) reduces it to 1-1.5 years. Light use (1-2 clicks a day) can extend it to 3-4 years.
Extreme temperatures and storing the fob near the car reduce battery life. Limit button presses and keep the fob away from the vehicle for better battery efficiency.
| Usage Frequency | Avg. Battery Life | Battery Efficiency |
|---|---|---|
| Daily (10+ clicks) | 1–1.5 years | Low |
| Moderate (5 clicks/day) | 2–3 years | Medium |
| Rare (1–2 clicks/day) | 3–4 years | High |
What Are the Signs of a Dying Key Fob Battery?
A dying battery in your 2020 Hyundai Elantra key fob will often show warning signs like reduced remote range and delayed button response.
You might notice the LED on the fob isn’t lighting up, or your dashboard could alert you with a “Key Fob Battery Low” message.
To confirm the battery’s condition, use a multimeter to check if the voltage is below 3V.
Warning Signs
A dying key fob battery shows signs like short remote range, slow button response, and dashboard warnings.
Watch for these signs:
- Short Remote Range: Works only when very close to the car, often within 10 feet.
- Slow Button Response: Pressing buttons gives slow or inconsistent reactions.
- Dashboard Warning: “Key Fob Battery Low” message might appear.
Testing Methods
Check your key fob battery with a multimeter. It should read at least 3 volts.
- Look for Corrosion: Check for corrosion or leaks.
- Use a Multimeter: Set it to volts. Below 3 volts means replace.
- In-Car Test: Place fob in ignition or near dashboard. Check for warnings.
Where Can You Buy a Replacement Key Fob Battery?
You can buy a replacement key fob battery for your 2020 Hyundai Elantra from retailers like AutoZone, Amazon, Walmart, and Hyundai dealers, with prices ranging from $2 to $12.
While AutoZone and Walmart offer in-store options for $3 to $6, Amazon provides online convenience and competitive pricing from $2 to $5.
Opting for genuine Hyundai batteries from a dealer ensures compatibility, but aftermarket options like Energizer and Duracell are more budget-friendly and widely available.
Retailer Options
Replacement key fob batteries for the 2020 Hyundai Elantra are available at AutoZone, Amazon, Walmart, and Hyundai dealers. AutoZone offers in-store shopping with prices $4-$6. Amazon provides online delivery at $2-$5. Walmart has both in-store and online options at $3-$5. Hyundai dealers sell genuine batteries in-store and online for $8-$12.
| Retailer | Price Range | Availability |
|---|---|---|
| AutoZone | $4 – $6 | In-store |
| Amazon | $2 – $5 | Online |
| Walmart | $3 – $5 | In-store/Online |
| Hyundai Dealer | $8 – $12 | In-store/Online |
Genuine vs Aftermarket
Genuine batteries fit perfectly and last longer but cost more. Aftermarket batteries are cheaper and easy to find.
– Genuine Batteries Pros:
- Fit Hyundai cars well.
- Last longer.
- Fewer fob issues.
– Genuine Batteries Cons:
- Cost more ($8–$12).
- Only at Hyundai dealers.
– Aftermarket Batteries Pros:
- Cheaper ($2–$6).
- Found at many stores.
What Should You Do If Your Key Fob Stops Working?
If your key fob stops working, start by checking and replacing the battery if necessary.
Ensure the battery is inserted correctly, and try reprogramming the fob by holding the lock and unlock buttons for ten seconds.
If the fob remains unresponsive, use the physical key to unlock your car and press the fob against the start button while braking to start the engine.
Troubleshooting Steps
Check the battery in your Hyundai Elantra key fob. Ensure it’s a CR2032, properly placed with the positive side down. Replace if old.
Remove nearby devices like phones or metal items that might block the signal.
- Battery Placement: CR2032 should have the positive side facing down.
- Battery Replacement: Use a new CR2032 for old batteries.
- Signal Interference: Keep phones and metals away.
Emergency Access Methods (Detail how to access car with dead key fob)
Use the key inside your Hyundai Elantra’s fob to unlock the car if the fob fails.
- Find the emergency key in the fob. Slide the release button and remove the metal key. Use it in the driver’s door lock.
- To start, press the fob against the start button while holding the brake. The car recognizes the fob even with a weak battery.
- If entry fails, change the fob battery or contact your dealer.
How Can You Extend Key Fob Battery Life?
To extend your key fob battery life, avoid unnecessary button presses and store it away from the car.
Keeping the fob in a cool, dry place and using a Faraday pouch can prevent signal drain and prolong battery life.
Replace the battery every two years to maintain optimal performance.
Battery Conservation Tips
Extend key fob battery life: use sparingly, keep away from heat, check health, replace every 2-3 years.
Tips to Extend Key Fob Life:
- Battery Checks: Inspect battery health regularly, replace after 2–3 years.
- Energy Use: Press buttons only when needed.
- Temperature Care: Avoid extreme heat.
Storage Recommendations
Keep your key fob in a cool, dry spot to save battery. Avoid heat, moisture, and electronics to prevent quick drain or interference.
| Proper Storage | Improper Storage | Impact on Battery Life |
|---|---|---|
| Cool, dry drawer | Near car | Reduced lifespan |
| Faraday pouch | In direct sunlight | Accelerated drain |
| Away from electronics | Loose with electronics | Signal interference |
| 10+ feet from car | In a hot car | Drains quickly |
| Controlled environment | In humid areas | Corrosion risk |
What Features Stop Working When the Key Fob Battery is Low?
Keyless entry and remote start are the first features to fail when your key fob battery is low.
You’ll notice reduced remote range and delayed response times, which can be frustrating.
Fortunately, you can still access your 2020 Hyundai Elantra using the physical key and start the car by pressing the fob against the start button.
Affected Features
If your key fob battery is low, keyless entry and remote start will stop working first. The signal weakens as the battery dies.
You might notice these issues:
- Keyless Entry: Difficulty unlocking doors remotely.
- Remote Start: Can’t start your car from a distance.
- Reduced Range: Fob needs to be closer to the car.
Check your battery regularly to avoid issues.
Backup Systems
If your key fob battery is low, use the physical key to unlock the door and press the fob against the start button to start your Hyundai Elantra.
| Feature | Emergency Method |
|---|---|
| Door Access | Use the physical key in the door |
| Starting Engine | Press the fob against the start button |
These steps help maintain access and mobility when the fob battery fails.
People Also Ask
How much does a 2020 Hyundai Elantra key fob battery cost?
A new battery for a 2020 Hyundai Elantra key fob costs between $2 and $12.
Stores like AutoZone, Walmart, and Amazon sell them.
Good brands like Energizer and Duracell can last 2 to 4 years.
Choose a reliable brand to avoid unexpected lockouts.
Can you start a 2020 Elantra with a dead key fob?
Yes, you can start a 2020 Hyundai Elantra with a dead key fob by pressing it against the start button while stepping on the brake.
This allows the car to detect the fob and start.
Remember to replace the fob battery soon for full features.
Does AutoZone replace key fob batteries?
AutoZone doesn’t change key fob batteries, but you can buy them there.
For a 2020 Hyundai Elantra, get a CR2032 battery. The staff can help you find the right one.
They sell trusted brands like Energizer and Duracell.
What happens if key fob battery dies while driving Hyundai Elantra?
If your Hyundai Elantra’s key fob battery dies while driving, the car will keep running.
The key fob is only needed to start the car, not to keep it going.
Always keep a spare battery handy to avoid problems when starting the car.
Wrapping Up
Replacing your Hyundai Elantra key fob battery is a breeze and saves both time and money. Like a trusty sidekick, a working key fob makes life easier. Swap out the CR2032 battery to avoid the headache of a dead fob and keep it running smoothly. Spot dying battery signs, have replacements ready, and extend battery life to keep your Elantra’s key fob in top shape with ease.