By Justin To replace the key fob battery in your 2020 Hyundai Elantra, you’ll need a CR2032 3V lithium coin cell battery. These batteries usually last about 2-3 years, depending on how often you use your fob. To swap it out, gently open the fob, insert the new battery with the positive side facing down, and put it back together. If you start noticing a shorter range or a lag in response, it’s time for a change. You can find replacement batteries at places like Walmart or Amazon. Don’t forget to check out tips on how to extend your key fob battery life and troubleshoot any issues!
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, with compatible alternatives including the CR2025 and CR2016.
This standard battery type is commonly used across various automotive key fobs, ensuring accessibility and ease of replacement.
When selecting a battery, consumers should consider brand longevity and performance, as options like Energizer and Panasonic offer varying lifespans and price points.
Battery Specifications
For the 2020 Hyundai Elantra key fob, use a CR2032 battery (3V).
You can also use CR2025 or CR2016 as backups. These batteries ensure the key fob works properly.
- CR2032: 3V, 20mm diameter, 3.2mm thickness
- CR2025: 3V, 20mm diameter, 2.5mm thickness
- CR2016: 3V, 20mm diameter, 1.6mm thickness
- Voltage Consistency: All options maintain a 3V output.
Use the right battery for the best key fob performance.
Battery Brand Options
A 2020 Hyundai Elantra key fob uses a CR2032 battery. This 3V lithium coin cell battery works well for key fobs, watches, and small electronics. Different brands offer CR2032 batteries with varying lifespans and prices.
| Brand | Avg. Lifespan | Price Range |
|---|---|---|
| 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 the recommended option for longer use. For those on a budget, Amazon Basics offers a lower-cost alternative. The choice of brand affects how well the key fob works and how long the battery lasts.
How Do You Change the Battery in a 2020 Elantra Key Fob?
To change the battery in a 2020 Hyundai Elantra key fob, you will need a small flathead screwdriver and a CR2032 battery.
The process begins with removing the physical key from the fob, followed by opening the fob to access the battery compartment.
Attention to the battery orientation during replacement ensures proper functionality, and users should handle the fob with care to avoid damaging the internal components.
Step-by-Step Guide
To replace the battery in a 2020 Hyundai Elantra key fob, follow these steps:
- Press the release button on the side of the fob to remove the physical key.
- Use a small flathead screwdriver to gently twist and open the fob at the slot near the keyhole.
- Take out the old battery and insert a new CR2032 battery, ensuring the + side is facing down.
- Snap the fob halves back together and reinsert the physical key.
Safety tip: Do not touch the circuit board to avoid static damage.
Required Tools
To replace a 2020 Hyundai Elantra key fob battery, you need a few simple tools:
- Small Flathead Screwdriver: Helps to pry open the fob.
- Coin: Can be used instead of a screwdriver.
- CR2032 Battery: This is the battery type required for the fob.
- Safety Gloves (optional): Protects against static damage while handling the fob’s parts.
Gather these tools to make the battery replacement process easy.
How Long Does a 2020 Elantra Key Fob Battery Last?
The battery life of a 2020 Hyundai Elantra key fob typically lasts between 2 to 3 years under normal usage conditions.
Various factors can influence this longevity, including frequency of use, environmental conditions, and storage practices.
For instance, frequent locking and unlocking can decrease battery life to as little as 1–1.5 years, while minimal usage may extend it up to 4 years.
Battery Life Factors
A 2020 Hyundai Elantra key fob battery lasts about 2 to 3 years with normal use.
Several factors can affect battery life:
- Frequency of Use: Frequent locking and unlocking drains the battery quicker.
- Temperature Extremes: High heat speeds up battery drain, while extreme cold can reduce performance.
- Proximity to the Vehicle: Keeping the fob near the car might use more battery.
- Storage Practices: A cool, dry place helps the battery last longer; poor storage can lead to faster depletion.
Usage Patterns
The battery life of a 2020 Hyundai Elantra key fob ranges from 1 to 4 years, depending on how often you use it. Frequent button presses drain the battery faster, while less use can help it last longer.
| Usage Frequency | Average Battery Life |
|---|---|
| Daily (10+ clicks) | 1–1.5 years |
| Moderate (5 clicks/day) | 2–3 years |
| Rare (1–2 clicks/day) | 3–4 years |
To extend battery life, limit unnecessary button presses and store the fob away from the vehicle. Consider changing the battery every 2 to 3 years to prevent sudden failures.
What Are the Signs of a Dying Key Fob Battery?
Signs of a dying key fob battery include reduced remote range, delayed button responses, and dashboard alerts indicating a low battery.
Recognizing these symptoms is crucial for maintaining the functionality of the Hyundai Elantra’s keyless entry system.
Testing methods, such as using a multimeter or checking for dashboard warnings, can help determine battery health before complete failure occurs.
Warning Signs
Low battery signs in a key fob include:
- Reduced Remote Range: The fob works only within a short distance, usually less than 10 feet.
- Delayed Button Response: There might be a noticeable delay when pressing the buttons before the car responds.
- Dashboard Alerts: The car may show a warning about a low key fob battery.
- Non-Functioning LED Light: The LED light on the fob does not turn on when buttons are pressed.
Recognizing these signs can help you replace the battery in time, ensuring your access to the Hyundai Elantra remains hassle-free.
Testing Methods
To check a key fob battery’s strength, follow these methods:
- Multimeter Test: Use a multimeter to measure voltage. A good CR2032 battery should show at least 3V.
- Dashboard Alert: After starting the vehicle, watch for messages like “Key Fob Battery Low.”
- Remote Range: If the key fob only works when close to the car, the battery may be weak.
- Button Response: If there’s a delay when pressing buttons, the battery might be dying.
Regular checks can help avoid being locked out of your vehicle.
Where Can You Buy a Replacement Key Fob Battery?
Replacement key fob batteries for the Hyundai Elantra can be purchased at retailers such as AutoZone, Walmart, Amazon, or directly from a Hyundai dealer.
Each option comes with varying prices and availability, with AutoZone and Walmart typically offering competitive rates for aftermarket batteries, ranging from $3 to $6.
Genuine batteries from a Hyundai dealer may cost between $8 to $12, ensuring guaranteed compatibility, while aftermarket options like Energizer and Panasonic provide reliable alternatives at lower prices, though with potential variances in quality and lifespan.
Retailer Options
You can buy key fob batteries for the Hyundai Elantra at different retailers, with prices between $2 and $12. Here are some options:
- AutoZone: $4–$6, available in-store.
- Amazon: $2–$5, available online.
- Walmart: $3–$5, available in-store.
- Hyundai Dealer: $8–$12, available in-store.
AutoZone allows immediate in-store shopping.
Amazon offers convenience with online ordering.
Walmart provides good prices and accessibility.
Authorized Hyundai dealers guarantee OEM quality but charge more.
Genuine vs Aftermarket
When replacing the battery for a Hyundai Elantra key fob, you have two main options: genuine and aftermarket batteries.
Here’s a quick overview:
- Genuine Batteries: These are more expensive but ensure a perfect fit and reliable performance.
- Aftermarket Batteries: These are cheaper, but quality can vary by brand.
- Reputable Brands (e.g., Energizer, Panasonic): These provide reliable performance and are often cheaper than genuine options.
- Budget Brands (e.g., Amazon Basics): These save money but may have a shorter lifespan.
Genuine batteries come from dealers, guaranteeing compatibility.
Reputable aftermarket brands can deliver similar performance at lower prices.
Your choice should reflect your priorities for cost, reliability, and how long you want the battery to last.
What Should You Do If Your Key Fob Stops Working?
If a Hyundai Elantra key fob stops working, check the battery orientation, reprogram the fob, and test for electronic interference.
Troubleshooting begins with verifying if the battery is installed correctly, as incorrect placement can prevent the fob from functioning.
If orientation is correct, reprogramming the fob by holding the lock and unlock buttons for ten seconds may resolve the issue, while assessing for interference from nearby electronic devices can also be beneficial.
Troubleshooting Steps
Troubleshooting a non-working key fob starts with checking the battery. If you notice a shorter range, slow response, or dashboard warnings, follow these steps:
- Check battery orientation: Make sure the battery is positioned with the + side down.
- Reprogram the fob: Hold the lock and unlock buttons together for 10 seconds.
- Test for interference: Remove nearby objects like smartphones or metal that might disrupt the signal.
- Replace the battery: If problems continue, install a new CR2032 battery.
Emergency Access Methods
To access a car with a dead key fob, follow these steps:
- Use the physical key stored in the fob to unlock the driver’s door.
- Insert the key and turn it to open the vehicle.
- To start the engine, press the fob against the start button while pressing the brake.
- If necessary, check the fob battery and replace it to regain functionality.
These steps help you access and operate your Hyundai Elantra in emergencies.
How Can You Extend Key Fob Battery Life?
To extend the life of a Hyundai Elantra key fob battery, users should minimize button usage and store the fob away from the vehicle.
Proper storage in a cool, dry place can prevent unnecessary battery drain.
Additionally, proactive battery replacement every two years can help avoid unexpected failures.
Battery Conservation Tips
To extend the battery life of a Hyundai Elantra key fob, follow these simple tips:
- Avoid pressing buttons unless needed to save battery.
- Store the fob at least 10 feet away from the vehicle to prevent signal drain.
- Replace the battery every 2 years, even if it still works.
- Keep the fob in a cool, dry place to avoid heat damage.
Storage Recommendations
Store a Hyundai Elantra key fob properly to extend its battery life. Keep it in a cool, dry place to avoid heat and moisture that drain the battery quickly. Improper storage can cause the battery to deplete faster.
| Proper Storage | Improper Storage |
|---|---|
| Cool, dry drawer | Near the car or in direct sunlight |
| Faraday pouch (blocks signals) | Loose in a bag with electronics |
| Away from moisture | Exposed to high humidity |
| Minimal electronic interference | Close to other signal devices |
Following these tips helps maintain key fob battery life and ensures it works when needed.
What Features Stop Working When the Key Fob Battery is Low?
When the key fob battery is low, features like keyless entry and remote start typically fail first, limiting user convenience.
A diminished battery can reduce the effective range of the fob, often restricting operation to within ten feet.
In case of a complete battery failure, drivers can still unlock doors using the physical key and start the engine by pressing the fob against the start button while braking, ensuring some level of functionality remains.
Affected Features
Low key fob battery levels first affect keyless entry and remote start features. As battery power decreases, the effective range of the fob may shrink to about 10 feet, causing inconvenience.
- Keyless Entry: Unlocking doors without a key becomes unreliable.
- Remote Start: Starting the vehicle from a distance may not work.
- Trunk Release: Accessing the trunk remotely may be difficult.
- Panic Button: The panic alarm might fail, limiting safety.
These issues make timely battery replacement necessary for vehicle security and convenience.
Backup Systems
Backup systems ensure vehicle access even if the key fob battery is low. Drivers can use the physical key to unlock the doors and start the engine by pressing the fob against the start button while braking.
| Feature | Emergency Method |
|---|---|
| Door access | Physical key in door slot |
| Starting engine | Press fob against start button while braking |
| Keyless entry | Not functional with low battery |
| Remote start | Not operational with low battery |
| Dashboard alerts | May indicate “Key Fob Battery Low” |
These options keep drivers in control during low-battery situations.
People Also Ask
How much does a 2020 Hyundai Elantra key fob battery cost?
A 2020 Hyundai Elantra key fob battery usually costs between $2 and $12.
The best option is a CR2032 3V lithium battery. Brands like Energizer and Duracell offer good choices, and you can find cheaper options too.
Changing the battery often helps keep your key fob working well.
Can you start a 2020 Elantra with a dead key fob?
Yes, you can start a 2020 Hyundai Elantra with a dead key fob.
Just press the fob against the start button while pressing the brake.
This way, you can still drive your car even if the fob battery is dead.
Does AutoZone replace key fob batteries?
AutoZone does not replace key fob batteries, but you can buy CR2032 batteries there for $4 to $6.
These batteries work for many key fobs, like the 2020 Hyundai Elantra. You can also find them at Walmart and Amazon.
What happens if key fob battery dies while driving Hyundai Elantra?
If the key fob battery dies while driving a Hyundai Elantra, you can still drive the car.
Just press the fob against the start button while pressing the brake.
However, the remote functions won’t work until you change the battery.
Wrapping Up
To replace your 2020 Hyundai Elantra key fob battery, simply use a CR2032 battery.
Keeping your key fob in good shape is like ensuring your car runs smoothly. Regular battery changes let you access your Elantra hassle-free. Watch for signs of a weak battery, and with some simple care, you can make your key fob last longer, keeping it a trusted part of your driving routine.