diff --git a/source/_integrations/oralb.markdown b/source/_integrations/oralb.markdown
index b482724c5da..3068dbd1a97 100644
--- a/source/_integrations/oralb.markdown
+++ b/source/_integrations/oralb.markdown
@@ -48,3 +48,7 @@ The integration can discover most Bluetooth-enabled Oral-B toothbrushes. Brushes
 - Time - total brushing time in seconds.
 - Toothbrush state - whether the toothbrush is running, idle.
 - Battery - toothbrush battery percentage.
+
+<div class='note'>
+Updates of the battery sensor require an active Bluetooth connection and relatively close proximity. If you use a [bluetooth proxy](https://www.home-assistant.io/integrations/bluetooth/#remote-adapters-bluetooth-proxies), please ensure it supports active connections. All the other sensors update with active or passive connections. 
+</div>