I can post my solution if necessary but with all the native struct definitions, it ends up around 500 lines of code. Use DeviceIoControl with battery handle, IOCTL_BATTERY_QUERY_INFORMATION and marshalled structs to to retrieve battery info ( BATTERY_INFORMATION).Īlso see the Enumerating Battery Devices post on MSDN as I found that quite helpful. Use DeviceIoControl with battery handle, IOCTL_BATTERY_QUERY_TAG to retrieve battery query info ( BATTERY_QUERY_INFORMATION). Use CreateFile with the device path to get handle to battery. Use SetupDiGetDeviceInterfaceDetail to get the device path ( SP_DEVICE_INTERFACE_DETAIL_DATA). Use SetupDiEnumDeviceInterfaces to get the device data ( SP_DEVICE_INTERFACE_DATA). Left-click the This PC application that appears. To access it, type This PC into the Windows search bar. Use SetupDiGetClassDevs to get a device handle to the battery ( GUID_DEVCLASS_BATTERY). PowerShell will generate a battery report and save it to your computer. At the top of the battery report, you will see. However, if you experience the same issues I did, here is a summary of the steps required for Win32API. The report will outline the health of your laptop battery, how well it has been doing, and how much longer it might last. Since that didn't work, I re-wrote my solution using Win32 API and was successfully able to get accurate values that way. Click 'Yes' on the pop-up box asking if you want to allow the app to make. ![]() However, on the test laptops I ran the WMI query ( Win32_Battery) against, which included multiple manufacturers, I consistently ran into the problem of FullChargeCapacity always returning zero. Select Terminal (Admin) (Windows 10 users select 'Windows PowerShell (Admin)) (Image credit: Laptop Mag) Step 3. The first route normally taken would be through a WMI query ( Win32_Battery). As someone who has solved this problem before, let me make a few comments. It seems that you are looking for the values of FullChargeCapacity, DesignCapacity and CurrentCapacity. Windows Management Instrumentation Query Language, or WQL, is what you want to search for to learn more about it.Īlso take a look at ahawker's answer, it may end up being more helpful if WMI isn't properly capturing the battery data, as he notes. ManagementObjectCollection collection = searcher.Get() įoreach (ManagementObject mo in collection)įoreach (PropertyData property in mo.Properties)Ĭonsole.WriteLine("Property ", property.Name, property.Value) Īlso, note that you are basically running a SQL-like query against WMI, so you can vary that if you want. In Windows 10, use Device Manager to set Allow The Computer To Turn Off This. ManagementObjectSearcher searcher = new ManagementObjectSearcher(query) Most laptops have an indicator light showing whether AC power is being. query = new ObjectQuery("Select * FROM Win32_Battery") ![]() I first added a reference to the System.Management assembly. Here's a brief example of accessing WMI information using C#. So my guess is that you can use WMI to read these two values, and then calculate FullChargeCapacity/DesignCapacity to find the battery health percentage number. Comparison of the value to the DesignCapacity property determines when the battery requires replacement. It has two fields that look interesting - DesignCapacity, which tells youĭesign capacity of the battery in milliwatt-hours.Īnd FullChargeCapacity, which has the fascinating note thatįull charge capacity of the battery in milliwatt-hours. > "%~dpn0.vbs" ECHO MsgBox vbLf ^& "The laptop is currently running on its battery." ^& vbLf ^& vbLf ^& "The battery is !BatteryStatus.%BatteryStatus%!." ^& vbLf ^& vbLf ^& "Connect the laptop to the mains voltage if possible.Don't have a laptop to test with, but I'm guessing you could use the WMI class Win32_Battery. :: Check the battery status, and display a warning message if running on battery power SET BatteryStatus.9=charging and criticalįOR /F "tokens=*" %%A IN ('WMIC Path Win32_Battery Get BatteryStatus /Format:List ^| FIND "="') DO SET %%A However, the battery is not necessarily charging. SET BatteryStatus.2=The system has access to AC so no battery is being discharged. Using WMIC :: Variables to translate the returned BatteryStatus integer to a descriptive text
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