I saw in one of your messages that you are thinking about a charge
indicator. That's one of the things that I'm putting into my box. Also
I'm adding a circuit to show the current setting of the dew heater. Each
circuit will pull about 20mA of power from the battery, so it's not even
worth thinking about :-) Even in high power mode, when it shows a pretty
bar graph, it still pulls about 100mA with all ten LED's lit. I'll be
posting up the circuit diagrams once I've got it all working.

(hopefully tonight!)

Regards

Colin.