diff --git a/zsh/prompt.zsh b/zsh/prompt.zsh
index 8f4d0c2..a2d8fac 100644
--- a/zsh/prompt.zsh
+++ b/zsh/prompt.zsh
@@ -67,7 +67,7 @@ zshrc_prompt_precmd() {
 	# battery percentage, if acpi is available
 	local battery_pct=
 	if [[ -d /sys/class/power_supply/BAT*(#qN) ]] && type acpi &> /dev/null; then
-		battery_pct="$(acpi -b | cut -d, -f2 | sed -e 's/[^0-9]//g')"
+		battery_pct="$(acpi -b | cut -d, -f2 | sed -e 's/[^0-9]//g' | head -n1)"
 
 		# colorize battery percentage or display status
 		if [[ $battery_pct -le 20 ]]; then