Change Battery Notification Level in Regedit

Adjusting battery charge status thresholds in Windows allows you to control the exact battery percentage at which low and critical battery notifications trigger. While typically handled via power options, modifying these system-wide thresholds via the Windows Registry Editor (Regedit) allows for precise, automated, or administrative configuration across different power plans. This guide explains how to locate the relevant power scheme keys and set your desired battery percentage thresholds.

Step 1: Open the Registry Editor

1. Press Windows Key + R to open the Run dialog box.
2. Type regedit and press Enter.
3. If prompted by User Account Control (UAC), click Yes.

Step 2: Identify Your Active Power Scheme

Battery settings are stored under individual power schemes. To modify the currently active scheme:

1. Navigate to:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\User\PowerSchemes

2. In the right pane, locate the string value named ActivePowerScheme.

3. Note down the GUID value shown in the Data column (e.g., 381b4222-f694-41f0-9685-ff5bb260df2e for Balanced).

Step 3: Navigate to Battery Power Settings

1. In the left navigation pane, expand your active power scheme GUID folder:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\User\PowerSchemes\<Your-Active-GUID>

2. Expand the subgroup GUID for battery settings:

   e73a048d-bf27-4f12-9731-8f2074e889f5

Step 4: Select the Notification Threshold to Modify

Under the e73a048d-bf27-4f12-9731-8f2074e889f5 key, select the subkey matching the notification threshold you want to change:

• Low Battery Level: 8183ba9a-7682-4814-b001-d050213d91a8
• Critical Battery Level: 9a66d842-2994-4e41-8377-1a4f22c34e5e
• Reserve Battery Level: f3c5027d-cd16-4930-aa6b-90bf844a47b7

Step 5: Adjust the Battery Percentage

Inside the selected subkey:

1. Double-click the DCSettingIndex DWORD value (this controls the threshold when running on battery).
2. In the edit window, change the Base to Decimal.
3. Enter the desired percentage integer in the Value data field (e.g., enter 15 for 15%).
4. Click OK.
5. (Optional) Repeat the process for ACSettingIndex to adjust the threshold while plugged into power.

Step 6: Apply Changes

Close the Registry Editor. Restart your computer or switch power plans to ensure the new battery threshold values take effect immediately.