diff --git a/FAQ.md b/FAQ.md
index a3243a72cd..0ad0b3a5a7 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -1390,6 +1390,7 @@ Note that polling frequently (more than every 30-60 minutes) will likely use mor
 because connecting to the server and comparing the local and remote messages are expensive operations.
 
 [On some devices](https://dontkillmyapp.com/) it is necessary to *disable* battery optimizations (setup step 4) to keep connections to email servers open.
+In fact, leaving battery optimizations enabled can result in extra battery usage for all devices, even though this sounds contradictory!
 
 Most of the battery usage, not considering viewing messages, is due to synchronization (receiving and sending) of messages.
 So, to reduce the battery usage, set the number of days to synchronize message for to a lower value,