diff --git a/libraries/AP_Frsky_Telem/AP_Frsky_Telem.cpp b/libraries/AP_Frsky_Telem/AP_Frsky_Telem.cpp
index 9c68f749da..cca3526b17 100644
--- a/libraries/AP_Frsky_Telem/AP_Frsky_Telem.cpp
+++ b/libraries/AP_Frsky_Telem/AP_Frsky_Telem.cpp
@@ -36,7 +36,7 @@ AP_Frsky_Telem::AP_Frsky_Telem(AP_AHRS &ahrs, const AP_BattMonitor &battery, con
 /*
  * init - perform required initialisation
  */
-void AP_Frsky_Telem::init(const AP_SerialManager &serial_manager, const char *firmware_str, const uint8_t mav_type, const AP_Float *fs_batt_voltage, const AP_Float *fs_batt_mah, const uint32_t *ap_valuep)
+void AP_Frsky_Telem::init(const AP_SerialManager &serial_manager, const char *firmware_str, const uint8_t mav_type, const uint32_t *ap_valuep)
 {
     // check for protocol configured for a serial port - only the first serial port with one of these protocols will then run (cannot have FrSky on multiple serial ports)
     if ((_port = serial_manager.find_serial(AP_SerialManager::SerialProtocol_FrSky_D, 0))) {
@@ -51,8 +51,6 @@ void AP_Frsky_Telem::init(const AP_SerialManager &serial_manager, const char *fi
         queue_message(MAV_SEVERITY_INFO, firmware_str);
         // save main parameters locally
         _params.mav_type = mav_type; // frame type (see MAV_TYPE in Mavlink definition file common.h)
-        _params.fs_batt_voltage = fs_batt_voltage; // failsafe battery voltage in volts
-        _params.fs_batt_mah = fs_batt_mah; // failsafe reserve capacity in mAh
         if (ap_valuep == nullptr) { // ap bit-field
             _ap.value = 0x2000; // set "initialised" to 1 for rover and plane
             _ap.valuep = &_ap.value;
@@ -582,15 +580,8 @@ uint32_t AP_Frsky_Telem::calc_param(void)
     case 1:
         param = _params.mav_type; // frame type (see MAV_TYPE in Mavlink definition file common.h)
         break;
-    case 2:
-        if (_params.fs_batt_voltage != nullptr) {
-            param = (uint32_t)roundf((*_params.fs_batt_voltage) * 100.0f); // battery failsafe voltage in centivolts
-        }
-        break;
-    case 3:
-        if (_params.fs_batt_mah != nullptr) {
-            param = (uint32_t)roundf((*_params.fs_batt_mah)); // battery failsafe capacity in mAh
-        }
+    case 2: // was used to send the battery failsafe voltage
+    case 3: // was used to send the battery failsafe capacity in mAh
         break;
     case 4:
         param = (uint32_t)roundf(_battery.pack_capacity_mah(0)); // battery pack capacity in mAh
diff --git a/libraries/AP_Frsky_Telem/AP_Frsky_Telem.h b/libraries/AP_Frsky_Telem/AP_Frsky_Telem.h
index 5de86760a3..fb9ad67ff9 100644
--- a/libraries/AP_Frsky_Telem/AP_Frsky_Telem.h
+++ b/libraries/AP_Frsky_Telem/AP_Frsky_Telem.h
@@ -120,7 +120,7 @@ public:
     AP_Frsky_Telem &operator=(const AP_Frsky_Telem&) = delete;
 
     // init - perform required initialisation
-    void init(const AP_SerialManager &serial_manager, const char *firmware_str, const uint8_t mav_type, const AP_Float *fs_batt_voltage = nullptr, const AP_Float *fs_batt_mah = nullptr, const uint32_t *ap_valuep = nullptr);
+    void init(const AP_SerialManager &serial_manager, const char *firmware_str, const uint8_t mav_type, const uint32_t *ap_valuep = nullptr);
 
     // add statustext message to FrSky lib message queue
     void queue_message(MAV_SEVERITY severity, const char *text);
@@ -153,8 +153,6 @@ private:
     struct
     {
         uint8_t mav_type; // frame type (see MAV_TYPE in Mavlink definition file common.h)
-        const AP_Float *fs_batt_voltage; // failsafe battery voltage in volts
-        const AP_Float *fs_batt_mah; // failsafe reserve capacity in mAh
     } _params;
     
     struct