Customer Reviews

Cheap, weatherproof flash power.
I have been using the CP-E3 as a high voltage battery pack for my two 580EX, and single MT-24EX flash units. It works very well. It's light, carries 8 AA NiMh batteries, and will power an entire wedding shoot without choking.

When the 580EX II flash was announced, it featured weather sealing, and the weather sealed CP-E4 was announced at the same time. I added a 580EX II to my flash arsenal, and recently bought a CP-E4 to go with it. I was pleasantly surprised to see that the CP-E4 is pretty much identical to the older model, except for the weather sealing. It is so nice to not have to worry about rain invading the battery pack, and the new flash connector also makes a water tight seal at the flash unit.

As a bonus, the old 580EX unit is not weather sealed, but when used with the new CP-E4, it's high voltage connection IS sealed. That makes a huge difference when shooting in misty drizzle. The CP-E4 is a perfect update to the CP-E3, which was almost perfect to begin with.

Besides, at it's current price, it is easy to have backup units with fresh batteries ready to go at a wedding or other shoot.

A must for any wedding or even photographer!!!
This is great. the old CP-E3 was a great unit, but the new and sealed CP-E4 is even better. If you shoot weddings or any type of event, this is a must have! And now that its sealed also, that means you can shoot in mist and drizzle and not have to worry about it. Its a perfect add on to the sealed 580 EX II and the 1D Mark 3.

I also use mine with my twin tube Macro lite, the MT-24Ex.

If you use a newer flash, and for the faster recycle and longer battery lifer you should be, then you need this Battery Pack! If you ever shoot in cold weather, this is even more of a must have!!!!!

JUST FINE...What do you expect anywy?...
Frankly, I've yet to use this item. Though I can say that the reviews by others of this item the E4 and the E3, say's all that need be said. It's as light weight as possible which is a good thing in a battery pack and the hook up is easy and off course the all important interface is suitable with all my Canon speedlights and cameras. Really there's not much about it not to like other then the price. Which no doubt ought to be cut by at least half or two thirds, which I'm sure will happen with time. I purchased the pack for shooting at events after dark. Often one must be very quick during events to get shots which are any good at all. Unless you were to flood large areas with light what hope is there of getting any usable shots at all, otherwise. This battery pack will give me that extra needed speed at night events to get good shots. ~~~~~~ Addendum: I finally got around to testing out this battery pack, and it's perfectly functional and suites my purposes. ~~ As for using it, if at all possible I try and not use flashes. As of yet I've not had to use it on a job, but no doubt there will come a time when I'll have no other choice if I want to get the shots I need. And, I'll be prepared... ~~~ Good luck.