Hello 240dnewbie
Best guess is clock at 0.27 amp draw.
Something is not right here; if the battery keeps going dead.
What is the time frame for the battery drain, one day, one week, three months?
Follow up testing.
You need:
#1. Starter cranking amperage draw test.
#2. Alternator; Voltage and amperage out-put test data.
#3. Battery load test data.

If all of these come back ok; repeat the amperage draw test every day for five days, it may be an intermittent short or random sticking relay.