diff --git a/wrapper-sensors-battery.sh b/wrapper-sensors-battery.sh
index 6412bd2..fd6207a 100755
--- a/wrapper-sensors-battery.sh
+++ b/wrapper-sensors-battery.sh
@@ -5,4 +5,8 @@ PATH=$PATH:/usr/local/bin
 # Add the following to crontab:
 # @daily /<path-to-your-script>/wrapper-sensors-battery.sh
 #
-(/home/mischa/hue/get-sensors.py $(cat /home/mischa/hue-bridge) $(cat /home/mischa/hue-token) -b 60) | mail -s "Hue Battery Status" $(cat /home/mischa/hue-email)
+result=$(/home/mischa/hue/get-sensors.py $(cat /home/mischa/hue-bridge) $(cat /home/mischa/hue-token) -b 20)
+
+if [ -n "$result" ]; then
+	echo "${result}" | mail -s "Hue Battery Status" $(cat /home/mischa/hue-email)
+fi