diff --git a/ArduPlane/Parameters.cpp b/ArduPlane/Parameters.cpp
index 268c81a8fd..007d142d78 100644
--- a/ArduPlane/Parameters.cpp
+++ b/ArduPlane/Parameters.cpp
@@ -1250,7 +1250,7 @@ const AP_Param::GroupInfo ParametersG2::var_info[] = {
 
     // @Param: FWD_BAT_VOLT_MAX
     // @DisplayName: Forward throttle battery voltage compensation maximum voltage
-    // @Description: Forward throttle battery voltage compensation maximum voltage (voltage above this will have no additional scaling effect on thrust).  Recommend 4.4 * cell count, 0 = Disabled
+    // @Description: Forward throttle battery voltage compensation maximum voltage (voltage above this will have no additional scaling effect on thrust). Recommend 4.2 * cell count, 0 = Disabled. Recommend THR_MAX is set to no more than 100 x FWD_BAT_VOLT_MIN / FWD_BAT_VOLT_MAX, THR_MIN is set to no less than -100 x FWD_BAT_VOLT_MIN / FWD_BAT_VOLT_MAX and climb descent rate limits are set accordingly.
     // @Range: 6 35
     // @Units: V
     // @User: Advanced
@@ -1258,7 +1258,7 @@ const AP_Param::GroupInfo ParametersG2::var_info[] = {
 
     // @Param: FWD_BAT_VOLT_MIN
     // @DisplayName: Forward throttle battery voltage compensation minimum voltage
-    // @Description: Forward throttle battery voltage compensation minimum voltage (voltage below this will have no additional scaling effect on thrust).  Recommend 3.5 * cell count, 0 = Disabled
+    // @Description: Forward throttle battery voltage compensation minimum voltage (voltage below this will have no additional scaling effect on thrust).  Recommend 3.5 * cell count, 0 = Disabled. Recommend THR_MAX is set to no more than 100 x FWD_BAT_VOLT_MIN / FWD_BAT_VOLT_MAX, THR_MIN is set to no less than -100 x FWD_BAT_VOLT_MIN / FWD_BAT_VOLT_MAX and climb descent rate limits are set accordingly.
     // @Range: 6 35
     // @Units: V
     // @User: Advanced