FWIW, I have just the reg 'ol Interstate battery and remove it upon putting it into storage and then put it in cellar on a piece of wood then add just a battery tender to it for the next several months. As far as brand of tender, most of what I have are from Harbor Freight and another is Battery Minder/tender itself. No probs w/ the HF ones and I use 2 as well that I keep in the snowmobile trailer to keep 2 batts up to snuff cuz they don't get used as much as the 3rd one.