private async void battery_ValueChangeCompleted(BatteryLevelCharacteristics batteryLevel)
		{
			await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
			{
				this.BatteryLevel = batteryLevel.BatteryLevel + "%";
			});
		}
		async void BatteryServiceHandler_ValueChangeCompleted(BatteryLevelCharacteristics batteryLevel)
		{
			await dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
			{
				this.BatteryLevel = batteryLevel.BatteryLevel + "%";
			});
		}