diff --git a/zsh/prompt.zsh b/zsh/prompt.zsh
index 7c1fe78..0acc5d6 100644
--- a/zsh/prompt.zsh
+++ b/zsh/prompt.zsh
@@ -57,7 +57,7 @@ zshrc_prompt_precmd() {
 
 	# battery percentage, if acpi is available
 	local battery_pct=
-	if type acpi &> /dev/null ; then
+	if [[ -d /sys/class/power_supply/BAT*(#qN) ]] && type acpi &> /dev/null; then
 		battery_pct="$(acpi -b | cut -d, -f2 | sed -e 's/[^0-9]//g')"
 
 		# colorize battery percentage or display status