MT Stringer wrote in post #7950162
I've made them before (year before last). I was just doing some research on an alternative route. This 580 is brand new and I'm not interested in doing any body work on it. The 540EZ's and the 430EX I had each had some grinding on the door so the cable would pass through.
I've still got the battery pack but I took it apart and haven't reassembled it. I wanted more power. After about 600 pops at 1/4 power, it was taking longer than 2 seconds to recycle, and during a basketball game, 2 seconds can be a long time!
I was using the 6v, 4.5 ah battery. I'd like to be able to get off at least three shots during play on the football field. I've given up trying to strobe the basketball game with hot shoe flashes.
I have used an Al Jacob's tuxedo which has a 1.4 Ah battery before for basketball and it lasted for 3 games (freshman, JV, and Varsity) My pack I made is a 3.5Ah I used two 550EX or two 580EX and even two Sunpak 544 for basketball, volleyball, and wrestling and never seem to have a problem with hotshoe flashes covering these events. I use a 580EX for football on ETTL plus 1 or manual at 1/4 power and never have to worry about shots with the pack I use.
The Canon CP-E4 or CP-E3 are high voltage packs that run right into the the flashes built in connector. But remember the saying "Speed Kills". Do you want your flash to act like running a 100m dash super fast and poop out or act like it is running a marathon being steady and going on for ever? That is the question you have to ask yourself and deside.