Excerpt: I've only used it once so far for an awards dinner, but I was happy with the results. Most of my flashes were far less than full power (depending on distance), but recharge time was just about half of normal; meaning about 1 1/2 to 2 1/2 seconds.
Hint: don't use lithium's!
Excerpt: I shoot with a flash an average of 150 shots per week. The recycle time is great but here's what keeps this from being a great tool -
1 one large lithium rechargeable batter would be much better that having 6 AA batteries.
Excerpt: Let me begin with saying that I am professional event photographer in Miami, FL so that you have an idea of what I do use this product for.
I bought this adapter to go along with my HVL-58AM flash, which is an amazing flash all in itself.
Excerpt: Using this has made my 56 flash, well, usable. The recycle time was terribly long and the batteries lasted for a very short time without the pack. With the pack, I've done 2 multi-hour shoots on one set of batteries (10 total - 6 in the pack, 4 in the flash).
Excerpt: We bought it to decrease the cycle time between flashes and we when we first hooked it up, it showed significant increases in speed, but when we took it to our first shoot, it performed about the same as the flash by itself. Yes, the batteries were fully charged. Yes they were brand new batteries.