I own over a dozen speedlights that I normally use for off camera lighting that can use external batteries. Until now I have only used in flash batteries. SD-8, SD-8As and SD-9's were always overpriced in my opinion. Well I have noticed the price on the battery packs are now lower (used units) and now third party companies makes them. I noticed some only contain 6 AA batteries. They claim 1 sec recycle time at full power. Anyone use the Nikon or these off brand battery packs? Do they allow 1 sec recycle even at full power? Price is down to about $50 to $90 and that's easier to swallow than the $190 or more for new Nikons. I have AC, and AC/ DC monolights with batteries. But I tend to go to speed lights for easy carry and quick set ups.