I am suddenly very busy with weddings and as many of you may know the receptions tend to be in places with horrid light. I was thinking that an external battery pack may give my 580EX II not only the additional longevity that it desires but most importantly the faster recycle time that I desire. That brings me to my question, how do you feel about aftermarket battery packs?


For instance, www.flashzebra.com sellstheir 8 AA Cell Battery Pack for Canonfor $65.00. The CanonCP-E4 costs $150.00. Thoughts? Opinions? Practical experience?