Windows 10: [Guide] How to auto-adjust brightness when running on battery/charging

Discus and support [Guide] How to auto-adjust brightness when running on battery/charging in Windows 10 Graphic Cards to solve the problem; Hey guys, Windows 10 removed the option to set one brightness level for running a laptop on AC, and another for running on battery (forcing you to... Discussion in 'Windows 10 Graphic Cards' started by GreyWasMyFriend, Mar 8, 2020.

  1. [Guide] How to auto-adjust brightness when running on battery/charging

    Hey guys,

    Windows 10 removed the option to set one brightness level for running a laptop on AC, and another for running on battery (forcing you to either have one constant battery level, or change it manually - there was no way in the system you could change this).

    A kind user over at the Autohotkey forums helped me find an answer.

    First, head over to AutoHotkey and install the program (32 bit or 64 bit, depending on your Windows 10 install).

    Then, head on over to this thread, check out VSUB's post, and click 'Download' above the script they've posted.

    You can change brightness on charge and brightness on battery by changing the values of the script that are bolded below:

    SendMessage,0x0422,0,50, msctls_trackbar321
    IniWrite,Off,% A_ScriptDir"\Power.ini",Status,Battery
    SendMessage,0x0422,0,10, msctls_trackbar321
    IniWrite,On,% A_ScriptDir"\Power.ini",Status,Battery

    I've got my AC/charging brightness set at 90% (the first value, 50), and my on-battery value set to 50% (the second value, 10).

    To edit an Autohotkey script (.ahk), right click the script, click 'Open with...', select notepad, edit those values, then save the script as an .ahk again.

    As vsub says, make sure that you're plugged in the first time you run the task. You can add it to your start menu Startup folder or schedule it to start when Windows starts as per other tutorials.

    I know a lot of us were frustrated by this, so for those googling:

    Windows 10 change brightness on battery
    Windows 10 how to change brightness on AC
    Windows 10 Power Plan Brightness Charging and Battery

    GreyWasMyFriend, Mar 8, 2020

  2. Plugged in but battery does not charge

    If the laptop works without the battery then charger is functioning correctly. Take a cloth with a bit of rubbing alcohol on it (or some on-the-go alcohol swabs), and clean the metal contacts that connect your battery to your laptop.

    Make sure to install all Windows important updates.

    Install latest versions of your laptop device drivers you can download the latest device drivers from the device manufacturer or from your laptop manufacturer website.

    Step 1

    1. Shutdown your laptop.

    2. Remove the battery.

    3. Connect the AC power adapter to your laptop.

    4. Power on the laptop

    5. Open the Device Manager by typing Devmgmt.msc into Start Menu or from Control Panel.

    6. Under the Batteries category, right-click all of the Microsoft ACPI Compliant Control Method Battery listings, and select Uninstall (it’s ok if you only have 1).

    [Guide] How to auto-adjust brightness when running on battery/charging pbDp4sx.png

    7. Shutdown the laptop.

    8. Insert the battery.

    9. Power on the laptop.

    If above suggestions wont resolve the battery charge issue then follow below steps.

    Step 2

    1. Shutdown the laptop.

    2. Remove the battery.

    3. Start the laptop with only AC adapter connected to laptop.

    4. When you login to Windows OS connect the battery while Windows OS working.

    Step 3

    Reset the System Management Controller. Use one of these methods to reset the SMC, which controls battery management, battery status light.

    1. Shut down the computer and disconnect the power cord.

    2. Remove the battery.

    3. Press and hold the power button for ten seconds.

    4. Reattach the battery and AC power adapter, then start up the laptop.

    Hopefully one of the above suggestions will help you resolve the battery not charging problem. If battery still doesn't charge, you may need to replace your battery.
    FreeBooter, Mar 8, 2020
  3. Brightness can not be adjusted.

    Hi Sirajudeen,

    Do let us know the following to assist you better with this issue:

    • What is the make and model of your device?
    • Were you able to see any error message/ error code with this issue?
    • Have you tried to install all the pending updates for drivers and Windows Updates on your device?

    This issue might have happened due to corrupted/ outdated drivers.

    I suggest you to refer to the below Microsoft article, try the troubleshooting steps suggested to change the brightness and check if it helps.

    Adjust your monitor's brightness and contrast

    Hope it helps. Get back to us with an updated status of changing the brightness and required information for further assistance.

    Thank you.
    Deepika Gowda, Mar 8, 2020
  4. jenaheng Win User

    [Guide] How to auto-adjust brightness when running on battery/charging

    Adjusting brightness on X3-02

    How do I adjust the brightness on my X3-02? The user guide said we should adjust the brightness to save battery life, but I can't find it on my phone.

    The specifications stated "Adjustable screen brightness", where is it?
    jenaheng, Mar 8, 2020

[Guide] How to auto-adjust brightness when running on battery/charging

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