--- a/doc/Host-tools-overview	Thu Nov 05 23:17:31 2020 +0000
+++ b/doc/Host-tools-overview	Fri Nov 06 00:32:04 2020 +0000
@@ -56,12 +56,20 @@
 		used when running our own firmware on these phones.  See the
 		Compal-calibration article for more details.
 
-compile-fc-batt	This utility compiles a table of battery thresholds for the new
-		FreeCalypso battery management code from ASCII source into the
-		binary form suitable for uploading into /etc/batterytab on a
-		FreeCalypso device.  It is rarely used directly, instead
-		fc-fsio write-battery-table command invokes compile-fc-batt
-		behind the scenes.
+compile-fc-batt	This utility compiles a table of battery thresholds for our
+		FreeCalypso battery management code (FCHG) from ASCII source
+		into the binary form suitable for uploading into /etc/batterytab
+		(v1 binary format) on a FreeCalypso device.  It is rarely used
+		directly, instead fc-fsio write-battery-table-v1 command invokes
+		compile-fc-batt behind the scenes.
+
+compile-fc-batt2
+		This utility is like the original compile-fc-batt, but generates
+		v2 binary format for uploading into /etc/batterytab2.  This new
+		binary format is needed for the new FC Tourmaline version of
+		FCHG.  It is rarely used directly, instead fc-fsio
+		write-battery-table-v2 command invokes compile-fc-batt2 behind
+		the scenes.
 
 compile-fc-chg	This utility compiles a FreeCalypso battery charging
 		configuration file from ASCII source into the binary form