Add class Battery

BatteryWidget/Battery.cs

@@ -0,0 +1,15 @@
+using System.Windows.Forms;
+
+namespace BatteryWidget {
+
+    public class Battery {
+
+        public static int getBatteryPercentage() {
+            return (int) (SystemInformation.PowerStatus.BatteryLifePercent * 100);
+        }
+
+        public static bool isBatteryPowerOn() {
+            return (SystemInformation.PowerStatus.PowerLineStatus == PowerLineStatus.Online);
+        }
+    }
+}

BatteryWidget/BatteryWidget.csproj

@@ -40,6 +40,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Battery.cs" />
     <Compile Include="WidgetForm.cs">
       <SubType>Form</SubType>
     </Compile>