I have nice little external battery charger: http://www.amazon.com/Battery-Tender...attery+charger
that supposedly runs the batteries thru those cycles (initialization, bulk charge, and float mode). When I hook it up to my 2 6 volt batteries I always crawl under the bed and turn off the battery disconnect switch. As I was lying on the floor of Blue doing that today, I wondered if it is really necessary to do the disconnect when using the external charger?
What are others thoughts on that?