diff --git a/msg/BatteryStatus.msg b/msg/BatteryStatus.msg
index f87d413..e865161 100644
--- a/msg/BatteryStatus.msg
+++ b/msg/BatteryStatus.msg
@@ -46,7 +46,7 @@ uint8 BATTERY_FAULT_CELL_FAIL= 2 		# One or more cells have failed
 uint8 BATTERY_FAULT_OVER_CURRENT = 3 		# Over-current
 uint8 BATTERY_FAULT_OVER_TEMPERATURE = 4 	# Over-temperature
 uint8 BATTERY_FAULT_UNDER_TEMPERATURE = 5 	# Under-temperature fault
-uint8 BATTERY_FAULT_INCOMPATIBLE_VOLTAGE = 6 	# Vehicle voltage is not compatible with battery one
+uint8 BATTERY_FAULT_INCOMPATIBLE_VOLTAGE = 6 	# Vehicle voltage is not compatible with this battery (batteries on same power rail should have similar voltage).
 uint8 BATTERY_FAULT_INCOMPATIBLE_FIRMWARE = 7 	# Battery firmware is not compatible with current autopilot firmware
 uint8 BATTERY_FAULT_INCOMPATIBLE_MODEL = 8 	# Battery model is not supported by the system
 uint8 BATTERY_FAULT_HARDWARE_FAILURE = 9 	# hardware problem