diff --git a/.config/i3/overrides/config.post-main-90-laptop b/.config/i3/overrides/config.post-main-90-laptop
index fa583e0..8c0df8d 100644
--- a/.config/i3/overrides/config.post-main-90-laptop
+++ b/.config/i3/overrides/config.post-main-90-laptop
@@ -5,4 +5,4 @@ mode "system" {
 }
 
 # Battery manager
-exec_always --no-startup-id killall battmon.sh; ~/.config/i3/scripts/battmon.sh
+exec_always --no-startup-id killall battmon; ~/.config/i3/scripts/battmon
diff --git a/.local/bin/battmon.sh b/.local/bin/battmon
similarity index 96%
rename from .local/bin/battmon.sh
rename to .local/bin/battmon
index 273c379..be3568b 100755
--- a/.local/bin/battmon.sh
+++ b/.local/bin/battmon
@@ -29,7 +29,7 @@ function levelIsCritical() {
     [[ $(getLevel) -le $BAT_LEVEL_CRITICAL ]] && echo true || echo false
 }
 
-if [[ $(_acpib | wc -l) -gt 0 ]]; then
+if ! [[ $(_acpib | wc -l) -gt 0 ]]; then
     echo "No batteries installed."
     exit 0
 fi