Does anyone have any experience using the Canon 580EX/EXII with an external battery pack? I see Canon offers a "CP-E4" pack that uses "AA" batteries (+ there seem to be lots of cheap eBay knock-offs of said unit). Does anyone have any experience as to how these "AA" powered packs compare to a large rechargeable pack like one of the Quantum products (i.e. Turbo series)? The Canon pack is certainly a lot cheaper than the Quantum pack, but my experience with some of Canon's accessories has been hit and miss. I used to get a lot of use out of a couple of Quantum Battery 2 packs with Metz 45 flashes on my Hasselblads - I still have the packs and after many years they are still going (but sadly aren't compatible with the 6V Canon strobes)
As a follow-up - for those of you using battery packs with a gimbal head, where are you physically placing the battery? Are you zip-tying or taping to a trip leg / flash bracket / gimbal head itself?







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