How to Turn Off Always-On USB Power Charging in BIOS Easily

If you’ve ever plugged your phone into a desktop USB port overnight only to find it dead in the morning, or noticed your laptop battery draining while the device is fully shut down, you’re dealing with always-on USB power charging. Turning off always on usb power charging in bios is the standard fix for this issue, as it cuts unnecessary power to USB ports when your system is off. It’s a widespread quirk affecting most consumer PCs built after 2015.

Per EU ErP (Energy-related Products) regulation testing, enabled always-on USB ports draw up to 500mA per port when shut down. That’s 2.5W of constant power per port, which drains desktop CMOS batteries and 1, 5% of laptop charge every 24 hours. Let’s walk through how to disable this for your specific hardware.

Quick Answer

To turn off always on usb power charging in bios, restart your PC and enter the BIOS setup utility. Navigate to the Advanced or Power Management tab. Look for a setting labeled Deep Sleep Control, USB Power in Suspend, or ErP Ready.

The exact name depends on your motherboard brand. Set the setting to Disabled, then press F10 to save and exit. This will cut power to USB ports when your system is shut down or sleeping.

What Always-On USB Power Charging Is (And Why It’s Draining Your CMOS or Laptop Battery

Always-on USB power charging is a default firmware feature on most modern motherboards and laptops designed to let you charge phones, tablets, or other low-power devices even when your system is shut down, sleeping, or fully powered off. While convenient for users who want to top off devices without leaving a wall charger plugged in, it’s the leading cause of unexpected CMOS battery drain on desktop PCs. A drained CMOS battery triggers repeated BIOS time/date resets, boot failures, and lost custom BIOS settings.

On laptops, the feature drains 1, 5% of battery charge per 24 hours when the device is closed and powered off, per aggregate user repair reports. It’s a widespread quirk affecting most consumer PCs built after 2015, and as of 2026, nearly all new desktop and laptop models still ship with the feature enabled by default.

First: Identify Your Device, BIOS Interface, and Compliance Needs

The exact steps to disable always-on USB charging vary based on four key variables that change which settings are available and how you access them. Use the table below to confirm your setup before moving to the relevant steps for your hardware.

If you’re in the EU/EEA, you may already be required to enable ErP mode for energy compliance, which automatically disables always-on USB power as part of its default configuration. For all other users, the steps below will walk you through disabling the feature without enabling full ErP mode if you don’t need it. If your BIOS has an admin password set, you’ll need to enter it before you can modify any power management settings.

Decision Branch 1: You Need ErP/EuP Regional Energy Compliance

If you’re located in the EU/EEA, your device likely needs to comply with ErP/EuP energy efficiency standards, which limit off-state power draw to less than 0.5W per device. Enabling ErP mode in your BIOS automatically disables always-on USB charging as part of this compliance requirement, along with other wake-from-suspend features like keyboard and mouse wake. To enable it: enter your BIOS, navigate to Advanced > Power Management, set ErP Ready to Enabled, then press F10 to save and exit.

Note that this will also disable the ability to wake your PC from sleep via USB devices, which is a standard tradeoff for regional compliance.

Decision Branch 2: You Only Want to Disable Always-On USB Charging (No Full ErP Mode)

If you don’t need regional ErP compliance, you can disable always-on USB charging individually without turning off other wake or power management features. The exact setting name varies by manufacturer, but it’s almost always located in the Advanced or Power Management tab of your BIOS. Follow the steps for your device type below.

Desktop Motherboards (ASUS, Gigabyte, MSI, ASRock, etc.)

1. Restart your PC and press the BIOS entry key (usually Del, F2, or F10, depending on your motherboard brand) as it boots.
2. Navigate to Advanced > Power Management (or Advanced > APM Configuration on some older models).
3. Look for one of these brand-specific settings: ASUS labels it Deep Sleep Control, Gigabyte uses USB Power in Suspend, MSI uses USB Power Delivery in Off State, and ASRock uses USB Power in S5.
4. Set the setting to Disabled, then press F10 to save and exit.

OEM Laptops (Dell, HP, Lenovo, etc.)

1. Restart your laptop and press the OEM-specific BIOS entry key (F2 for Dell and Lenovo, F10 for HP, Esc then F10 for some Acer models) during boot.
2. Navigate to the Advanced tab, then select Power Management or USB Configuration.
3. Look for settings labeled USB Charging in Off State, Always-On USB, or USB Power Share, depending on your brand.
4. Set the setting to Disabled, then save and exit. Some OEM laptops also have a physical always-on USB charging toggle on the side or back of the device, so check for that first if you can’t find the setting in BIOS.

Mini PCs and Custom Small Form Factor Builds

1. Enter your mini PC’s BIOS using the key listed in your device’s manual (often F2, Del, or a small pinhole reset button for headless units).
2. Navigate to Advanced > Power Management.
3. Look for the Always-On USB or USB Power in Suspend setting.
4. Disable it, then save and exit. If you built your own SFF PC, follow the desktop motherboard steps above that match your board’s brand.

Conditional Step: If Your BIOS Is Admin Password-Locked

If your BIOS has an admin password set that you don’t have, you won’t be able to modify any power management settings to disable always-on USB charging. For desktop PCs, you can clear the BIOS password by removing the CMOS battery for 5, 10 minutes, then reinserting it to reset the firmware to default settings. For OEM laptops, you’ll need to contact the manufacturer’s support team with proof of purchase to request a password reset or BIOS unlock code, as most vendors block password resets for security reasons.

Note that clearing the CMOS will erase all custom BIOS settings, including boot order and overclock profiles, so you’ll need to reconfigure those after the reset.

Verify the Setting Worked: Test Your USB Ports Post-Shutdown

After saving and exiting BIOS, your system will reboot automatically. Once it’s fully powered on, shut it down completely (don’t use sleep or hibernate) to test the setting. The simplest test uses a basic USB power meter, which plugs into the USB port and displays real-time voltage and current draw.

Plug the meter into any front or rear USB port, then power off your PC. If the meter reads 0V and 0A, the always-on power disable worked.

Many motherboards also have a small LED next to USB ports that stays lit when always-on power is active, so you can do a quick visual check without a meter. If you still see power draw or the LED is lit, the setting didn’t apply. Double-check that you selected the correct setting name for your motherboard brand, and that you pressed F10 to save changes before exiting BIOS.

Some systems also require a full power cycle (unplug the power cable for 30 seconds) for the change to take effect.

Troubleshooting: What to Do If the Setting Is Missing From Your BIOS

If you’ve scoured every power management menu and can’t find any USB power toggle, the issue is almost always one of three things. First, your BIOS version is outdated. Older firmware often hides or misnames power settings, so check your motherboard or laptop OEM’s support site for the latest BIOS update.

Flashing the update will unlock missing settings in most cases.

Second, your device may be an EU-spec model with ErP mode enabled by default in firmware, which disables always-on USB implicitly without a separate toggle. You can confirm this by checking for an ErP Ready setting set to Enabled by default. Third, entry-level office laptops and budget desktop motherboards often omit the toggle entirely as a cost-saving measure.

If updating BIOS doesn’t reveal the setting, your hardware doesn’t support granular USB power control, so you’ll need to use one of the alternative methods covered later. Never flash a custom or unofficial BIOS to unlock the setting, as this will void your warranty and can permanently brick your motherboard.

Common Mistakes That Cause Unintended Side Effects

Disabling the wrong setting or skipping steps can lead to annoying side effects that are easy to avoid with a little caution. The most common mistake is enabling full ErP mode when you only wanted to disable USB charging. ErP mode disables all wake-from-suspend triggers, including USB keyboard and mouse wake, network adapter wake, and sometimes even power button wake from sleep.

If you rely on waking your PC by tapping a key, this will break that functionality.

Another frequent error is modifying unrelated power settings while in BIOS, like C-state configurations or SATA power management, which can cause boot failures, random wake-ups, or reduced performance. Forgetting to press F10 to save changes before exiting BIOS is also widespread, leading users to think the setting didn’t work when it was never applied in the first place. Finally, some users confuse the always-on USB toggle with USB selective suspend, which only disables USB power during sleep mode, not full system shutdown.

Always confirm the setting label matches the options listed for your motherboard brand before changing it.

On OEM laptops, vendor-specific power management software like Dell Power Manager or Lenovo Vantage can override BIOS USB settings, so check those tools if the change doesn’t take effect after a reboot.

Alternatives When BIOS Adjustment Isn’t Possible

If your device doesn’t have the always-on USB toggle in BIOS, or you can’t access BIOS due to a locked admin password, there are reliable hardware and software workarounds. For desktop users, physical USB power switches are the most effective solution. These devices plug into your motherboard’s USB header and give you a physical toggle for front panel USB ports, cutting power at the hardware level regardless of BIOS settings.

Some mid-to-high end desktop cases even include built-in USB power switches for front panel ports, so check your case’s documentation first.

For laptop users, a powered USB hub with an individual on/off switch for each port lets you cut power to all connected devices without unplugging them. Many OEM laptops also include a small physical toggle switch for always-on USB charging located near the USB ports on the chassis, which overrides BIOS settings entirely. Enterprise users with managed workstations can use endpoint management tools to disable USB power across multiple devices without accessing individual BIOS menus.

These alternatives don’t offer the granular per-port control of BIOS settings, but they work reliably when firmware options are unavailable.

Image source: Openverse / Ted Mielczarek

Frequently Asked Questions

Will disabling always-on USB charging affect normal USB functionality when my PC is on?

No. This setting only cuts power to USB ports when your system is shut down, sleeping, or in a low-power S5 state. When your PC is powered on and running, all USB ports will work normally for charging, data transfer, and peripheral use.

Does enabling ErP mode disable all USB wake features?

Yes. Per EU ErP/EuP compliance rules, enabling ErP Ready disables all wake-from-suspend triggers, including USB keyboard, mouse, and network adapter wake. You will need to press the power button to wake your PC from sleep if ErP is enabled.

Why can’t I find the always-on USB setting in my BIOS?

This is usually caused by an outdated BIOS version, a hardware limitation on entry-level devices, or the setting being hidden under a brand-specific label like Deep Sleep Control or USB Power in S5. Updating your BIOS to the latest version from your OEM’s support site often reveals the missing option.

Can I disable always-on USB for specific ports only?

Some high-end desktop motherboards support per-port USB power control in BIOS, but most consumer laptops and budget desktops only offer a global toggle for all USB ports. If you need per-port control, a physical USB power switch or managed USB hub with individual port toggles is your best option.

Will disabling always-on USB fix my CMOS battery drain issue?

In most cases, yes. Always-on USB power is the most common cause of premature CMOS battery drain on desktop PCs, per aggregate motherboard support forum data. If disabling the setting doesn’t stop the drain, check for a failing CMOS battery, faulty motherboard circuitry, or other enabled wake features pulling power.