OOOOOPS....should have said mili-amps. One thing to also remember. If a battery has, lets say, a 700 amp load rating. Then at a 1 amp draw,(1.0) on the meter, it would take 700 hours to drain the battery completely and so on. The only catch to that is, you will never be able to drain the battery completely. It just will not power anything up, well lets say at 200 amps. The voltage will be tooo low. Ya got to do the math after you find out how large the draw is. A normal dome light in a car draws about 2-3 amps. Hence, a dome light left on all night will drain a battery. The lights may still be on but there are not enough amps left to turn the starter. Most things that have a keep alive memory (Co2 monitors, radios, etc) only draw minimal amperage. Somewhere in the .005 amps range. The only things you are after is the 12V side of your coach. One other thing you can do is....disconnect the negative cable. Put a 12V test light between the cable and battery post. If you get a bright light...start pulling fuses. When pulling the fuses,one at a time, that turns off the light. Thats the circuit to trace the drain in. Hope you understand what I am saying.