Fixup as in PR commits.

src/main/cms/cms.c

@@ -68,6 +68,10 @@
 
 #include "rx/rx.h"
 
+#ifdef USE_USB_CDC_HID
+#include "sensors/battery.h"
+#endif
+
 // DisplayPort management
 
 #ifndef CMS_MAX_DEVICE
@@ -993,6 +997,11 @@ void cmsUpdate(uint32_t currentTimeUs)
         return ;
     }
 #endif
+#ifdef USE_USB_CDC_HID
+    if (getBatteryCellCount() == 0) {
+        return;
+    }
+#endif
 
     static int16_t rcDelayMs = BUTTON_TIME;
     static int holdCount = 1;