diff --git a/apps/powermanager/README.md b/apps/powermanager/README.md
index 88b3c370a..7a0c110a6 100644
--- a/apps/powermanager/README.md
+++ b/apps/powermanager/README.md
@@ -7,6 +7,11 @@ Features:
 * Force monotonic battery percentage or voltage
 * Automatic calibration on charging uninterrupted longer than 3 hours (reloads of the watch reset the timer).
 
+
+## Widget
+The widget shows an approximate current power use. There is a power gauge showing the estimation of the currently used power and the currently active sensor with the biggest power draw.
+G for GPS, H for pulse sensor and C for compass.
+
 ## Internals
 
 Battery calibration offset is set by writing `batFullVoltage` in setting.json