diff --git a/zshrc b/zshrc
index 154887b..15c1a7a 100644
--- a/zshrc
+++ b/zshrc
@@ -395,6 +395,13 @@ fi
 ixio() { curl -F 'f:1=<-' ix.io }
 0x0st() { curl -F'file=@-' https://0x0.st }
 
+if [ -f /sys/class/power_supply/BAT0/power_now ]; then
+	power_now() {
+		awk '{ print $1*10^-6 " W" }' \
+			/sys/class/power_supply/BAT0/power_now
+	}
+fi
+
 cross() {
 	if [ $# = 0 ]; then
 		echo 'Usage: cross platform [architecture1] [architecture2]' \