diff --git a/chip-battery.sh b/chip-battery.sh
index 47ec02b..d726afd 100755
--- a/chip-battery.sh
+++ b/chip-battery.sh
@@ -61,7 +61,7 @@ function getChargeCurrent() {
 # shuts the system down if too less voltage
 function verifyBatteryVoltage() {
   echo "$(isBatteryAvailable)"
-  if [ "$(isBatteryAvailable)" -eq "1" ] ; then
+  if [ "$?" -eq "1" ] ; then
       local voltage=$(getBatteryVoltage)
       local chargeCurrent=$(getChargeCurrent)
       echo "Voltage: $voltage"
@@ -88,9 +88,6 @@ function setLed() {
 # @return ... true if button pressed else false as return value
 function isButtonPressed() {
   local value=$(cat ${POWER_BUTTON_GPIO}/value)
-  
-
-  
   if [ "$value" -eq "0" ] ; then
     shutdownCommand "shutdown on button pressed"
   fi
@@ -104,16 +101,16 @@ function verifyButton() {
 }
 
 function main() {
-  setupGpioInputButton
-  
+#  setupGpioInputButton
+ echo "hello" 
   while true ; do
-    setLed 1
+#    setLed 1
     verifyBatteryVoltage
-    setLed 0
+#    setLed 0
     sleep 3
   done
 }
 
 # start monitoring in subshell and nonblocking
-$(main)
+main
 #exit 0