diff --git a/doc/TODO allgemein.txt b/doc/TODO allgemein.txt
index 45c159c..9c5ee68 100644
--- a/doc/TODO allgemein.txt	
+++ b/doc/TODO allgemein.txt	
@@ -1,6 +1,8 @@
 Maybe:
     -> Time Measurement in component interface
     -> Time warnings
+    -> Blocking Battery Function in Battery class
+        - Callback function for output and shutdown things
 
 Do later:
     -> Program underfloorLighting