dont do the orbital, I killed mine-- definitely couldn't handle the 602sx's and now the 4000D made it say bye bye to keeping a good charge. Worse than optima in my opinion, mine was the "extreme" deep cycle gray batt.
Dave, the 4000D can kill any batt, thats not a fair comparison //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif