I had another quick question. What kind of "AA" batteries does everyone use in your speed-lights? I've been using energizer, but they don't seem to last more than a year and the overall battery life seem to shorten fast. In my research so far I've found that a lot of people like the Sayno Enelope's and few that like the Powerex brand. Honestly I didn't know that this would turn into a big project. I just want a good battery that has a shelf life, provides plenty of power and will last. Any ideas?