Index: manual/rockbox_interface/main.tex
===================================================================
--- manual/rockbox_interface/main.tex	(revision 28623)
+++ manual/rockbox_interface/main.tex	(working copy)
@@ -808,8 +808,13 @@
     \section{USB Charging}
 
     When running the \dap{} can be charged over USB without connecting to your
-    computer by holding \ActionStdUsbCharge{} while plugging in. This
-    allows you to continue using the \dap{} normally.
+    computer by pressing and holding a button while plugging in.  You will then
+    be able to continue using the \dap{} normally.
+
+    \note{Be aware that this button may still perform its normal function, so
+    it is recommended to use a button without harmful side effects, such as
+    ActionStdUsbCharge{}.}
+
   }
 }