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External Flashlight Battery Pack EP-N4 (Replace Canon CP-E4) for Canon Speedlite 600EX, 550EX, 580EX, 580EX II, MR-14EX, MT-24EX

3.8 out of 5 stars  See all reviews (8 customer reviews) More about this product

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Technical Details

  • Protective Design-Included protect case, which is available to hold on the belt or bag, easy to carry. Included the ''1/4'' thread screw which can hold on the tripod mount. The connecting plug anti-wrong insert design; avoid miss using to failure flashlight system.
  • Performance-Through the test, the external battery pack can be able to reduce the recycling time. The recycling time is less than half of the original; also this is increased double times of flash as original.
  • Convenience-The Pack uses 8 AA-size batteries (same batteries as the flash unit) prior to a shoot to ensure fast and smooth transitions from one battery set to the next. Ideal for the professional person.
  • Support to use: Canon-600EX, 550EX, 580EXII, EX580, MR-14EX and MT-24EX
  • Power: 8x AA type alkaline / NiMH batteries / AA-size lithium batteries can also be used (Not included), Output Voltage: 12v, Dimensions: 71 x 171 x 27 mm, Weight (without batteries): 170g, Application Temperature: 0C-40C

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Product details

  • Boxed-product Weight: 259 g
  • Manufacturer reference: EP-N4
  • ASIN: B008JGLGXM
  • Date first available at Amazon.co.uk: 10 July 2012
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (8 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

Caution: Depending on state of battery charge; please do not fire more than 20 times continuously and take 10 minutes intermission befor fire another shot.


Customer Questions & Answers

Customer Reviews

Top Customer Reviews
6 of 6 people found the following review helpful
4.0 out of 5 stars Does the job 11 Nov. 2012
By Boing
This product is about as third party as they come; the one I received is branded as "Shoot" rather than GTMax. Very little planning and design has gone into it and it is really cheaply made. However, it does the job.

In brief, the unit is basically a battery pack which has a sliding end that allows access to a tray which can accommodate 8x AA batteries, giving you 12 if you include the ones in your flash (I use this with a 580EX II). The unit connects to the flash by a 22" (56cm) curly cable which can stretch to over 60" (152cm). It has a sticker on it warning not to fire more than 20 consecutive flashes.

It comes with an odd little case which has a press-stud closure at one end, a velcro closure at the other, an adjustable velcro loop on one side, and a fixed belt loop on the other. Also packaged in the plain white box was a set of gibberish instructions (wouldn't be the same without them), and a long thumb screw for connecting the battery pack to the base of your camera via the tripod mount.

So the all-important part: tests.
- I used a 580EX II mounted on a Canon EOS 7D in gloomy but not dark conditions, high speed shooting, 2.0 aperture and 1/6400 shutter speed at 35mm, ISO 100.
- The fast shutter speed was chosen so that any frame not supplied enough light by the flash would be noticeably under-exposed or completely black.
- I allowed the flash to use full ETTL-II because this is how I am most likely to use it in any circumstances where I want to use high speed shooting with flash (kind of implies I won't be metering and setting manual power levels between shots).

Using just the batteries in the 580EX II, the flash was able to provide light for three frames with the third noticeably underexposed.
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1 of 1 people found the following review helpful
3.0 out of 5 stars Poor design makes it awkward to use 21 July 2014
Verified Purchase
This is the second battery pack I have bought, the other is the JJC offering. I found this one to be poorly designed. As can be seen in the product photo the battery tray is open ended. This means that pushing the tray back into the housing is what completes the circuit. However there is quite some resistance when doing this; it is very awkward to push back in and get the end clasp to engage.
Compare this with the JJC model with a closed battery tray and the differences are obvious.
This product does work but is awkward to use. I cannot recommend this.
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1 of 1 people found the following review helpful
2.0 out of 5 stars Difficult to fit batteries. 24 Jun. 2014
By Sinjohn
Verified Purchase
Have just received this item and first impression were ok .However trying to insert the aa batteries proved far more difficult than expected .empty tray fits easily ,with the batteries it requires considerable pressure to lock the battery tray in place ,how many times the unit will stand this pressure before breaking or jamming with batteries is the question.Also if you need to swop out the batteries mid shoot it could be v frustrating.For this reason considering if I keep the unit.
As to the unit in use to early to say.
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4.0 out of 5 stars Low cost battery pack 17 July 2013
By mcmilt
Verified Purchase
This unit looks really good and comes with a strong carry case. The only issue I have found in that my NIMH batteries are slightly large and need a bit of effort to get them to fit. Also I need to push quite hard to get the cover to latch in. Power cord feels good quality and the plug fits snuggly into my Canon speedlite. Overall good value for money when compared to the Canon equivalent.
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