External Battery Pack for a Canon flashes
Tired of long recycle times for my flash, I'm seriously considering an external battery pack to use with both my 580 EXII and my Canon MR-14EX ring flash. What do folks like/recommend?
The most powerful portable option seems to be the Quantum Turbo SC battery pack. However I'm concerned by this report of a Quantum battery pack frying two flashes, and Quantum denying blame. Has this happened to anybody else?
If I use the official Canon CP-E4 external pack, or one of the others based on AAs instead of a special battery, what sort of recycle time do I get? And how often do I have to swap/recharge batteries?