On the 200mA scale the amp reading is .02.
Does that seem normal?
Do you think that would drain a fully charged battery over, say, 4-5 months?
That is exactly what I expected, yes, that is normal.
that is 20 milliAmps and over the space of 4-6 months, will kill the car battery.
So, I advise you to do one of two things.
Lift the Negative Terminal ( far safer, if the wrench touches the car chassis, no sparks )
Or, install a huge breaker like we use on airplanes and big diesel trucks.
turn it to OFF,
and the battery is disconnected.
My gl1800 has a Voltmeter wired HOT to the battery terminals.
That VM has a small drain of about 3 milliAmps.
but, the bike already has a Standby drain of about 10 milliAmps.
I noticed immediately, that if I did not keep a Battery Tender on the bike, that in six weeks time, it would not start.
To put this into context, I used to work for a rural telephone company in Utah.
We covered the whole state servicing little tiny communities and mining camps.
The miles to get from the NW corner to the SE corner of the state is astronomical, so we used airplanes to get around. We had two of them, one for the boss, and one for me.
at each of the little airstrips we used, we had an older car, usually a Ford Ranchero because of the inline six, and the PU bed can be used to haul stuff.
We removed the batteries, and locked them up in a storage unit on site.
There would be times that the cars sat for 6 months or more, before we had to use the car again.
Install the battery, spray a whiff of Ether in the air filter housing, click, varoom!!!
those batteries held up over the winter months at -59 degrees, so we had to use Ether to keep from ruining the battery trying to pump gas from the tank up to the carb. the Ether allowed the engine to crank immediately, and the high RPMs made the fuel pump work great.