diff --git a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
index 2db25bb7b3..ee618a374b 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/skyviper-v2450/hwdef.dat
@@ -208,4 +208,8 @@ define HAL_BUTTON_ENABLED 0
 // disable scripting on SkyViper (should we enable this?)
 define AP_SCRIPTING_ENABLED 0
 
+// SkyViper does not have a second battery....
+define AP_BATT_MONITOR_MAX_INSTANCES 1
+define AP_MAVLINK_BATTERY2_ENABLED 0
+
 AUTOBUILD_TARGETS Copter