I had the ADS 3 also, loved it but six nine volt batteries was a killerOccasionally you'll see one on Ebay. I bought my ADS 3 in 1981, used it to death. I moved so many times over the years I have no idea what happened to it.
looking for deepseeker ads 6 9v battery holder used ones out there ? $30 + shipping kinda high only gave $60 for the detector