diff --git a/examples/misc/01-power/README.txt b/examples/misc/01-power/README.txt
index 2617ff8ad3..d865669d21 100644
--- a/examples/misc/01-power/README.txt
+++ b/examples/misc/01-power/README.txt
@@ -1 +1,4 @@
 This example code reports power status (plugged in, battery level, etc).
+
+Note that only Chrome-based browsers support this API currently. Firefox and
+Safari will report this as unsupported, but this may change later!