diff --git a/README.md b/README.md
index b715036..5752a9b 100644
--- a/README.md
+++ b/README.md
@@ -9,18 +9,23 @@ this connector allows the RPH0002 battery to be used a standalone, independently
 usage
 =====
 
-plug the connector in either way since it's reversible.
-toggle the switch to on, and the nearby red LED should light up.
+plug the connector at the bottom of the battery either way since it's reversible.
+toggle the switch to on, and the green RUN LED should light up.
+the strobing blue ACT LED shows the board is communicating with the battery.
 you are ready to use the battery.
-use the XT60 connector to easily connect wires to the battery.
+the XT60 connector allows easily connecting wires to the battery.
 
 use the DC barrel jack connector (5.0 mm OD, 2.1 mm ID) to charge the battery.
-the charger should be for a 13S battery pack, up to 54.6V, and 5A.
-when charging, the % should blink, and the charging level displayed.
+the charger should be for a 13S battery pack, up to 54.6V, and maximum 5A.
+when charging, the red LED next to the connector should turn on.
+on the battery display the % should blink, and the charging level displayed.
 
 when the switch is toggled to off, the battery light turns red.
 this clears after 10 minutes.
 
+currently it can only operate the batteries for the ES400B.
+the hardware supports the ES600, but not the firmware yet.
+
 mode of operation
 =================