We are looking at a popup to pull with our Subaru Outback. Dry weight is about 1,500 but should stay under 2,000 loaded up, or very close. The Outback's tow rating is 2,700lbs with 200lb tongue weight. Anyway, we do not want a battery if we can avoid it, we plan to power the camper with heavy duty extension cords straight from campground power, house or generator to AC/Fridge etc. with only engaging the trailer's actual electrical system rarely and planning on it only when attached to power, not off-grid anyway. It may be worth mentioning as well that the model we are considering is the Aliner Scout which has no propane system, all electric. The trailer is equipped standard with electric brakes and would have a wired break controller. My question is, does the battery do anything key that I would need it for attaching my trailer's electrical system to a power pole or generator (in those rare cases)? I can't imagine it would serve any purpose when using extension cords and bypassing the trailer's electric system. I know it is for working the emergency breakaway brakes should the trailer come separated from the TV but is that it's only job and if so am I required to have it? I had read if your rig is under 3,000lbs you don't need trailer brakes at all (breakaway or otherwise) but I'm not sure if that's a national standard, up to date or what. Obviously I want the trailer brakes hooked up but I'm not sure how necessary the battery is if it's only for the emergency release with such a small trailer. I live in Illinois if that's helpful. Thank you so much!!!