diff --git a/chip-battery.sh b/chip-battery.sh
index d726afd..9dfb9cd 100755
--- a/chip-battery.sh
+++ b/chip-battery.sh
@@ -39,7 +39,11 @@ function shutdownCommand() {
 # @return ... 0,1 as return value
 function isBatteryAvailable() {
   local flags=$(i2cget -f -y 0 0x34 0x01)
-  return $(((( $flags&0x20 ) >>5 ) == $TRUE ))
+  if (((( $flags&0x20 ) >>5 ) == $TRUE )); then
+    echo "1"
+  else
+    echo "0"
+  fi
 }
 
 # @return ... voltage as string