At 07:49 17 February 2016, krasw wrote:
Adding 1 amp switch/breaker for 200mA instrument draws 10% more power
from
battery because breakers have internal resistance. That may or may not be
significant. If you have 10 hrs battery capacity, you will loose on hour.

I doubt that.

10% of 200mA is 20mA, or 0,02A.
It would then take 50 Hours to reduce the charge by 1AH.

Is that a problem?