I run my FF and 12v pump off a 12v Batt. I carry two 8 amp hrs if I'm out all day and running the pump nonstop. (Running it down past 10.7v shortens the life) I was under the impression that lower voltage draws more amps or current? Isn't thyat why brown outs cause electronic stuff to burn out in your house? I trust you all are doing what you say but before I buy a 6v Batt to get more time with less waight, I'd like to know some more facts. Can anyone offer up some technical facts to set me straight?