Hyundai Battery Discharging

Hyundai Battery Discharging Warning

Hyundai vehicles may display a warning message alerting the driver that the battery is getting discharged. This error often comes when you start the engine on cold mornings or turn off the engine but keep the ignition on. For example, you continue to listen to the radio for at least ten minutes or more after shutting down the engine.

If the battery warning light on your Hyundai illuminates while driving, it is important to take immediate action. The warning light indicates that the alternator may not function properly, resulting in the vehicle relying solely on battery power. To prevent the further discharge of the battery, it is recommended to turn off any non-essential electrical accessories, such as the audio system, navigation, or air conditioning. It is important to have the alternator checked by a professional mechanic as soon as possible to prevent potential damage to the battery and other electrical components.

hyundai battery discharge warning on radio touch screen

The “Battery Discharge Warning” displays on the Audio/Nav screen when the vehicle’s battery cannot maintain a specified voltage level under the existing conditions. If the engine is running, the battery discharges faster than charged. The problem can be a worn drive slip, defective alternator, bad ground connection, or excessive current demand by electronic devices.

Error messages

Hyundai Battery Discharge Warning

It is normal for this warning to come on if the engine is off but the ignition is left on for over ten minutes. Electrical consumers such as chargers plugged into the power outlet, seat heater, climate control, USB port, radio, and vehicle lights can discharge the battery at a high rate, leading to this message.

If you have most of these electronic consumers on when the engine is off,  battery discharging warnings will come up much quicker.

The battery is getting discharged is a friendly reminder telling you to start the engine. The battery may die if you don’t start the engine or turn off the ignition. It can happen even in a new car.

start engine

To clear the battery getting discharged warning, start the engine to allow the alternator to recharge the battery. If you keep the ignition on, the battery will discharge to the point that you will not start the car and may need a jump start.

Battery Discharge Warning While Driving

If the battery discharge warning comes on when the engine is running, you have a problem that needs to be addressed. Common problems that can lead to Hyundai battery discharging include:


bad alternator causes hyundai battery discharge warning

If the battery gets discharged too fast, a warning occurs when the engine is idle or driving. In many cases, the alternator may be the problem.

If the alternator is not generating enough electricity to power the engine and electronic consumers, it may need to be replaced.

voltage regulator

The problem that causes this issue in most cases is a faulty voltage regulator. The voltage regulator is mounted on the back of the alternator. Even though you can replace just the voltage regulator, most auto repair shops recommend replacing the complete alternator as a unit.

Weak Battery

Weak Hyundai Elantra Battery

A weak battery is another common problem that can cause the Hyundai battery warning light to come on.

If the battery is not holding a charge or can no longer charge fast enough, you could end up with the battery is getting discharged on the dashboard or touch screen.

You can easily check if the battery is good with a car battery tester. A battery tester runs load tests on the battery to make sure the battery can hold a charge. Follow this guide to learn how to test your car battery yourself.

GPS System

Hyundai gps drains battery

The GPS module may get stuck in a Satellite searching mode, leading to the battery discharging at a high rate. One possible solution is to reset the GPS module by removing the GPS fuse for a few minutes.

On a Hyundai Elantra, you can reset the GPS by pressing the reset button for the GPS. Look for a reset button under the volume knob and hold it down for thirty seconds. The GPS will reboot and should operate normally.

Serpentine Belt

worn belt

A worn serpentine belt or weak belt tensioner can be why a Hyundai shows the battery is discharged when driving.

Ground Connection

ground connection

Another possible issue could be a poor ground connection. Check both battery terminals and ensure a good ground connection between the engine and frame.


Hyundai Battery Discharging Warning indicates that your Hyundai vehicle’s battery is not being charged properly and it’s discharging. This can happen when the alternator, the component that charges the battery while the engine is running, is not working correctly. As a result, the vehicle’s electrical systems will rely solely on the battery power, which will cause the battery to discharge quickly. In technical terms, this warning is caused by a malfunction or failure of the alternator, which is responsible for maintaining the battery charge. If this warning appears, it’s important to have your vehicle checked by a professional mechanic as soon as possible to prevent potential damage to the battery and other electrical components.

Frequently Asked Questions

What does it mean when it says battery discharging?

This means that your battery is losing voltage. You need to understand that your battery is discharging at a time when it is not directly charged. Battery discharging/draining can be an inactive or active process.

What would cause a car battery to discharge?

If the alternator is bad, it will cause the battery not to charge and let itself drain even when the car is running.
If you leave the lights or the radio running without the engine running, it will cause the battery to drain and lose its voltage.

How much is a battery for a Hyundai?

You can get a replacement/new battery for around $45-$250. Price may vary depending on the size, quality, and power.


  1. First, you should test the battery to make sure the battery is charging properly and holding a charge.
  2. Next, carry out a charging system test. Turn on the air conditioner and all lights. Your multimeter should register from 13.5 to 14.3 Volts. If it’s not reaching that level, your alternator may need to be replaced. If it’s reaching that level, but the battery keeps on discharging, your battery may not be holding a charge.
  3. Check for a parasitic current draw.
  4. Run a complete system scan using a Hyundai scanner.

We hope you find the Battery Discharging Warning Hyundai guide helpful. Check these troubleshooting and repair guides for more help on your Hyundai.


  • Rushit Hila • ASE Certified

    Rushit Hila, an ASE-certified engineer (G1 Automotive Maintenance and Repair), brings over two decades of hands-on experience in the automotive world to his writing. With a strong educational background, including a Master of Science in Engineering and a Bachelor of Science in Engineering, he has honed his skills and expertise through years of practical work. As a respected authority in the field, Mr. Hila is dedicated to offering insightful and valuable content that resonates with both vehicle owners and mechanics.

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