In doing research prior to purchasing my first flash for my DSLR system I have come across a wealth of information, including this post that outlined many great points in selecting the best rechargeable batteries for use with the flash unit.
Since I will use the flash unit in far between outings I was planing to use regular batteries at first. I am still trying to decide if rechargeable batteries are justified for my limited use situation.
Since I have loads of batteries laying around to run my 2 year old's toys, I always have them on hand. I know they are not cheap and to make a sound decision, I need to know how fast or how many flash cycles I can expect to get on a set of batteries.
To add some context, on a single night I can take anywhere from 500 to 1,000 photos. If half were to use flash would i last the night on a single set?
The flash I will probably purchase is either the Nikon speed light 600 or the new 700.