diff --git a/ArduSub/ReleaseNotes.txt b/ArduSub/ReleaseNotes.txt
index 14504ea127..a3413bc8ae 100644
--- a/ArduSub/ReleaseNotes.txt
+++ b/ArduSub/ReleaseNotes.txt
@@ -76,6 +76,12 @@ Other changes:
     - HIL_MODE
     - Various unused flags, members and methods
 
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Sub 3.4.1 04-May-2017
+
+Don't report battery percentage estimate. The estimate is only correct if battery
+is fully charged at boot. User should rely on voltage estimate.
+
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Sub 3.4 30-Dec-2016 / Sub 3.4-rc3 14-Dec-2016
 First Stable Release