diff --git a/config.h b/config.h
index 175017b..8f0a6a1 100644
--- a/config.h
+++ b/config.h
@@ -66,6 +66,7 @@ static const char unknown_str[] = "n/a";
 static const struct arg args[] = {
 	/* function format          argument */
 	{ cpu_perc, " CPU: %s% | ",  NULL    },
-	{ ram_perc, "RAM: %s% | ",  NULL    },
+	{ ram_perc, "RAM: %s% | ",   NULL    },
+	{ battery_perc, "BAT: %s% | ", "BAT0" },
 	{ datetime, "%s ",          "%F %T" },
 };