I bought one of Adam's flashes so now I have two (plus I sold my strobes a few months back. . . right before they told me that strobes are now allowed again to shoot volleyball, GRRRR). Anyway, I've been using the Energizer NiCad batteries... they're OK. I searched Amazon and the two most popular AA batteries seem to be the: Sanyo low self discharge 2000 mAH http://www.amazon.com/Sanyo-Eneloop...3?ie=UTF8&s=electronics&qid=1254745170&sr=8-3 Energizer 2450 mAH http://www.amazon.com/Energizer-NH1...ef=sr_1_1?ie=UTF8&s=hpc&qid=1254747616&sr=1-1 What have you had good success with? I've been using Energizer 2000 mAH batteries... they do seem to discharge rather quickly on their own. Other than that, they're OK.