How to get Battery Health Using C#

Question

I'm trying to get two values, DesignCapacity and FullChargeCacity, but they are not returning a value.

I'm using the code below:

public static bool CheckBattery()
{
    bool _testResult = false;
    string computer = ".";
    try
    {
        ManagementScope scp = new ManagementScope(@"\\" + computer + @"\root\cimv2");
        scp.Connect();

        SelectQuery sql = new SelectQuery("CIM_Battery");
        ManagementObjectSearcher mos = new ManagementObjectSearcher(scp,sql);
        ManagementObjectCollection moc = mos.Get();
        List<string> resultList = new List<string>();
        foreach (ManagementObject o in moc)
        {
            foreach (PropertyData property in o.Properties)
            {
                resultList.Add( property.Name + ":" +property.Value);
            }

            File.WriteAllLines("bat.txt", resultList.ToArray());

            //UInt16 availability = (UInt16)o["Availability"];
            //resultList.Add("Availability," + availability.ToString());
            //UInt16 batterystatus = (UInt16)o["BatteryStatus"];
            //resultList.Add("BatteryStatus," + batterystatus.ToString());
            //string status = (string)o["Status"];
            //resultList.Add("Status," + status);
            //UInt32 Desigcap = (UInt32)o["DesignCapacity"];
        }
    }
    catch (Exception ex)
    {
        string errr = ex.Message;
    }
    return _testResult;
}

How Can I avoid to get null values in this properties? In fact iterating the objects im getting this information:

Availability:2
BatteryRechargeTime:
BatteryStatus:2
Caption:Internal Battery
Chemistry:2
ConfigManagerErrorCode:?
ConfigManagerUserConfig:?
CreationClassName:Win32_Battery
Description:Internal Battery
DesignCapacity:?
DesignVoltage:17119
DeviceID:3338SANYO AL12A32
ErrorCleared:?
ErrorDescription:?
EstimatedChargeRemaining:100
EstimatedRunTime:71582788
ExpectedBatteryLife:
ExpectedLife:?
FullChargeCapacity:?
InstallDate:?
LastErrorCode:
MaxRechargeTime:
Name:AL12A32
PNPDeviceID:
PowerManagementCapabilities:System.UInt16[]
PowerManagementSupported:False
SmartBatteryVersion:
Status:OK
StatusInfo:?
SystemCreationClassName:Win32_ComputerSystem
SystemName:MX02L180
TimeOnBattery:?
TimeToFullCharge:?

Does using `Win32_Battery` instead of `CIM_Battery` make a difference? — vcsjones, Jun 12 '14 at 19:57
Really not, they return the same properties, and the same values. — Witcacy Martinez, Jun 12 '14 at 20:18
I found the way to get this values, using a batch file, generating a an XML report. — Witcacy Martinez, Aug 05 '14 at 19:57

Joshua Hysong · Accepted Answer · 2017-05-12T12:18:37.763

To get those particular values you need to do separate queries against different classes.

DesignCapacity can be queried from BatteryStaticData

FullChargeCacity can be queried from BatteryFullChargedCapacity

You'll need to use a different scope in the code also for the query. These classes are found in root/WMI instead of root/cimv2

string scope = "root/WMI";
string query = "SELECT DesignedCapacity FROM BatteryStaticData";

using (ManagementObjectSearcher batteriesQuery = new ManagementObjectSearcher(scope, query))
{
    using (ManagementObjectCollection batteries = batteriesQuery.Get())
    {
        foreach (ManagementObject battery in batteries)
        {
            if (battery != null)
            {
                foreach (var property in battery.Properties)
                {
                    Console.Log("Property name: " + property.Name + " Property value: " + property.Value);
                }
            }
        }
    }
}

How to get Battery Health Using C#

1 Answers1