"Blueskies" wrote

My power cord for the Lowrance 2000c has a little green LED in the part
that plugs in to the cigarette lighter plug it that lights up when it is
powered up...

I know understand that the GPS is made to accept ships power without the
power being altered, first. I agree that it is a problem deep in the unit.

I would just change the plug to go directly to the batteries, at a voltage
the batteries could accept without being over charged, and let the batteries
run the unit while being continuously charged and kept full by a regulated
power source, like a cell phone or something uses.

There are all kinds of universal 12 volt to whatever volt power supplies at
wally world. They would probably supply the right voltage, and enough
milliamps.
--
Jim in NC