Added Battery to MenuBattery

lib/Battery/battery.cpp

@@ -1,7 +1,7 @@
 /**
  * @file battery.cpp
  * @author Alexander Klein (alex@kleiax.de)
- * @brief 
+ * @brief Contains the implementation of the class Battery
  * @version 0.1
  * @date 2022-02-05
  * 
@@ -28,14 +28,6 @@ void Battery::loop() {
     this->lastMillis = millis();
 }
 
-double Battery::getBatteryVoltage() {
-    return this->batteryVoltage;
-}
-
-uint8_t Battery::getBatteryPercent() {
-    return this->batteryPercent;
-}
-
 double Battery::readInputVoltage() {
     // Reference voltage is 3v3 so maximum reading is 3v3 = 4095 in range 0 to 4095
     double reading = analogRead(this->pin);
@@ -52,7 +44,7 @@ void Battery::calculateBatteryVoltage() {
 }
 
 void Battery::calculateBatteryPercent() {
-    int8_t size = sizeof(this->capacityVoltages) / sizeof(this->capacityVoltages);
+    int8_t size = sizeof(this->capacityVoltages) / sizeof(*this->capacityVoltages);
     uint8_t i;
     for (i = 0; i < size; i++) {
         if (this->batteryVoltage <= this->capacityVoltages[i])