Added second discharge curve for 2200mAh type battery and hidden BatTyp menu entry

helper/battery.h

@@ -33,6 +33,12 @@ extern uint16_t          gBatteryCheckCounter;
 
 extern volatile uint16_t gPowerSave_10ms;
 
+typedef enum {
+    BATTERY_TYPE_1600_MAH,
+    BATTERY_TYPE_2200_MAH,
+    BATTERY_TYPE_UNKNOWN
+} BATTERY_Type_t;
+
 unsigned int BATTERY_VoltsToPercent(const unsigned int voltage_10mV);
 void BATTERY_GetReadings(const bool bDisplayBatteryLevel);