diff --git a/ROMFS/tap_common/init.d/4001_quad_x b/ROMFS/tap_common/init.d/4001_quad_x
index 96eebedb69..eb4038b83b 100644
--- a/ROMFS/tap_common/init.d/4001_quad_x
+++ b/ROMFS/tap_common/init.d/4001_quad_x
@@ -16,5 +16,6 @@ if tap_esc start -d /dev/ttyS4 -n 4
 then
 fi
 set OUTPUT_MODE tap_esc
+param set BAT_N_CELLS 4
 
 set MIXER quad_x