LAPTOP BATTERY STATUS WINDOWS
Should you keep Windows 11 battery saver always enabled?.
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LAPTOP BATTERY STATUS HOW TO
How to check battery health on Windows 11.How to check battery usage on Windows 11.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). Use SetupDiGetClassDevs to get a device handle to the battery ( GUID_DEVCLASS_BATTERY). However, if you experience the same issues I did, here is a summary of the steps required for Win32API. Since that didn't work, I re-wrote my solution using Win32 API and was successfully able to get accurate values that way. 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. 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. ManagementObjectSearcher searcher = new ManagementObjectSearcher(query) 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. Don't have a laptop to test with, but I'm guessing you could use the WMI class Win32_Battery.
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