diff --git a/platform/targets/MD-UV380/hwconfig.h b/platform/targets/MD-UV380/hwconfig.h
index 897e2c02..438e2aff 100644
--- a/platform/targets/MD-UV380/hwconfig.h
+++ b/platform/targets/MD-UV380/hwconfig.h
@@ -76,6 +76,9 @@
 #define FLASH_SDO GPIOB,4
 #define FLASH_SDI GPIOB,5
 
+/* Maximum battery voltage */
+#define MAX_VBAT 8.4f
+
 /*
  * To enable pwm for display backlight dimming uncomment this directive.
  *