Carol hit two of the big items that we forget draw continuously -- the TV antenae booster and those plug-in rechargeable flashlights. Some others that constantly pull-- your propane detector; (you already mentioned your smoke detectors (by the way, mine use 9-volt batteries and are not wired into the trailer wiring); and a big one is the moisture switch on the refridgerator. Even if the unit is turned off, I've found that mine still heats the door seal area and will drain my batteries in a day or so..
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