Retrieve max capacity from battery sensor

src/de/tudarmstadt/maki/simonstrator/api/component/sensor/battery/BatterySensor.java

@@ -51,7 +51,14 @@ public interface BatterySensor extends SensorComponent {
 	 *            in uJ
 	 * @return percentage
 	 */
-	public double energyCapacityOfBattery(double energy);
+	public double energyPercentageOfBattery(double energy);
+
+	/**
+	 * Get the maxium capacity of this battery
+	 * 
+	 * @return
+	 */
+	public double energyCapacity();
 
 	/**
 	 * Returns true, if the battery is empty.