System Battery Voltage is Low

A CMOS or BIOS battery may be to blame for this error, one of the few possible causes. The “System Battery Voltage is Low” problem in Windows 10 can have two main causes.

The CMOS battery must be reinserted or replaced.

In the event that the battery is knocked out of its charging slot, the voltage supplied may be reduced, and an error message may display. Furthermore, CMOS batteries only last a few years before they no longer supply enough voltage to boot the BIOS.

Second, the BIOS configuration has become corrupted.

One possible cause of the “System Battery Voltage is Low” error is the addition of new devices.

System Battery Voltage is Low

When you hear the term “System Battery Voltage”, it might seem a little overwhelming. But it’s an essential aspect of your computer’s functionality. In this article, we’ll break down what system battery voltage is, what causes low voltage issues, and address several commonly asked questions about the motherboard battery.

What is System Battery Voltage?

At its core, system battery voltage refers to the electrical charge stored in the CMOS (Complementary Metal-Oxide-Semiconductor) battery on your computer’s motherboard.

This tiny battery keeps the BIOS settings intact, even when the computer is turned off. The BIOS, or Basic Input Output System, is the software that initializes your hardware during the boot process.

What is a Motherboard Battery?

The motherboard battery, commonly known as the CMOS battery, preserves BIOS settings and the system clock’s real-time settings. It’s usually a coin-cell battery, often of the CR2032 type.

Causes of “System Battery Voltage is Low” Issue

The “System Battery Voltage is Low” error typically signifies a depleting CMOS battery. The reasons for this could be:

  1. Age: Most CMOS batteries last for 3-5 years. Over time, they lose their charge.
  2. External Factors: Prolonged exposure to high temperatures can cause the battery to drain faster.
  3. Faulty Batteries: Sometimes, you might just have a battery that didn’t meet quality standards.

Methods for Overcoming the “System Battery Voltage is Low” Message

Method 1. Try Inserting or Swapping Out Your CMOS Battery.

In most cases, resetting the CMOS battery or installing a new one would resolve the “System Battery Voltage is Low” problem. Follow these directions:

Step 1. First, you’ll need to open the computer’s case and locate the CMOS battery on the motherboard.

Step 2. The second step is to get rid of the battery.

Step 3. Time it out for 10 minutes after you take it off in Step 3.  After that, you may either reinstall the original CMOS battery or swap it out for a fresh one and start up your machine.

The “System Battery Voltage is Low” warning should now be accessible for further inspection. If you answered yes, move on to the next option.

Method 2. Delete the System Log of Events

Delete the system’s event log to fix the problem. Here’s what you need to do:

Step 1. To begin, boot into the computer’s basic input/output system (BIOS). For instructions on doing so on Windows 10/8/7 (HP/Asus/Dell/Lenovo, any PC), see this thread.

Step 2. Second, from the main BIOS configuration screen, select the Advanced menu, then either the System Event Log, Clear Event Log, or Clear System Event Log options.

Step 3. Click the Clear System Event Log option with Enter in Step 3. After making your selection, press Enter once more to confirm and allow the computer to boot.

So, you should double-check to see if the problem has been fixed.

Method 3. Upgrade your computer’s BIOS.

If it doesn’t work, try the last option for fixing the “System Battery Voltage is Low” warning. Specifically, here’s what you do:

Step 1. First, open System Information by searching for “msinfo” in the taskbar’s search box.

Step 2. Second, you’ll want to record the BIOS date and version in a text file or on paper after you find it.

Step 3. Third, because this procedure differs depending on the maker of your computer, you need consult the manufacturer’s website.

Can I Start a PC Without a CMOS Battery?

Yes, you can start a PC without a CMOS battery. However, each time you turn off the system, the BIOS settings and system clock will reset to their default states. This could lead to issues like incorrect time and date, or resetting of boot preferences.

Can I Replace the CMOS Battery Myself?

Absolutely! Replacing a CMOS battery is a straightforward task:

  1. Safety First: Make sure to turn off and unplug your computer.
  2. Open the computer case and locate the CMOS battery, which looks like a silver coin.
  3. Use a small flat-head screwdriver to gently pry out the battery.
  4. Replace it with a new one, ensuring the positive side faces upwards.
  5. Reassemble the PC and boot it up.

How Do I Reset My CMOS Battery?

Resetting the CMOS can resolve various hardware issues:

  1. Turn off and unplug your PC.
  2. Open the case and locate the CMOS jumper. It’s a set of pins with a tiny plastic piece covering two of them.
  3. Move the jumper to the other position, wait a few seconds, then move it back.
  4. Boot up your PC. If there’s no jumper, removing and reinserting the battery serves the same purpose.

Can Low Voltage Damage the Battery?

Yes. Prolonged exposure to low voltage can reduce the battery’s lifespan. For rechargeable batteries, deep discharges can cause the battery to deteriorate over time.

How Do You Increase Battery Voltage?

You can’t manually increase a battery’s voltage. If a device requires more voltage, you’d typically need a different battery. For rechargeable batteries, using a suitable charger ensures optimal voltage.

Does the CMOS Battery Recharge?

No, the typical CMOS battery in motherboards is not rechargeable. Once it’s depleted, replacement is the only option.

Closing Remarks

In that article, we covered all you needed to know to get rid of the “System Battery Voltage is Low” message. Overall, the second option is the most practical way to address the “System Battery Voltage is Low” warning.

The first and last answers are more challenging. But I’m crossing my fingers that one of these is the answer to your problem.

The system battery voltage is a critical aspect of your PC’s operation, ensuring that BIOS settings remain consistent. While issues with the CMOS battery are rare, understanding them ensures you’re better prepared to address any problems that arise. Regular maintenance and timely replacement can keep your computer running smoothly for years.