Index: manual/configure_rockbox/system_options.tex
===================================================================
--- manual/configure_rockbox/system_options.tex	(revision 20003)
+++ manual/configure_rockbox/system_options.tex	(working copy)
@@ -150,6 +150,16 @@
   playback.
 }
 
+\opt{accessory_supply}{
+\subsection{Accessory Power Supply}
+This option turns the accessory power supply \setting{On} and \setting{Off}.
+The Apple accessory protocol has been partially implemented in Rockbox, and
+thus there is a reasonable chance that your favourite accessory will work.
+The accessory may require power from the \dap{} to function, and if so you should turn
+this option \setting{On}. If it is not required, then turning this setting
+\setting{Off} will save battery and therefore result in better runtime.
+} 
+
 \opt{HAVE_BUTTON_LIGHTS}{
   \opt{e200}{
   \subsection{Wheel Light Timeout}