Compact Battery Pack CP-E4. Looking for support for this product? Product Support Looking to register this product? Register Now. SKU: 1947B001. Canon Compact Battery Pack CP-E4 for the Canon 580EX/2, 550EX, 540EZ, 430EZ, MT-24EX and MR-14EX Speedlite Flash Units. Canon CP-E4 battery pack. I’ve added a new gadget to my equipment: Canon’s compact battery pack for the Speedlite 580EX, acting as external power supply for the flash. Alternative brand Battery Pack to Canon CP-E4 Compact Battery Pack I was looking into buying the CANON CP-E4 COMPACT BATTERY PACK (preferrably with the optional CPM-E4 RAPID CHANGE BATTERY MAGAZINE). This is the new Battery Pack which is weather sealed to match the 1D bodies and latest EX 580 and 600 flash guns. Anyway, the price is absurd. Approx £160 for the Battery Pack, which is nothing more than a hollow plastic case into which one inserts one's own AA batteries and there may be a small circuit board in there too to regulate current. The Magazine, well, don't even ask how Canon can justify charging a whopping £46 for that!! I prefer this type of device to something like a Quantum battery pack as it is lighter and more flexible, given the ability to change battery cells yourself. However, I am loathe to pay those obscene prices. So does anyone know of a good alternative make? I have seen similar stuff on eBay, some taking 6 batteries and others taking 8 and some even having the spare magazine bundled as part of the price. I am curious as to whether Canon's Battery Pack has some circuitry that makes it more reliable than many of these eBay clones? And even if it does, I don't think the price is justified so I am hoping that some third-party manufacturer makes something as relieable, well built and at a sensible price. ![]() Thanks in advance for your assistance. Regards, plevyadophy. The updated Canon Compact Battery Pack looks virtually identical to previous external battery packs for speedlites. But it contains numerous internal upgrades, all designed to make it a best-match battery pack for the latest Speedlite 600EX II-RT. And, it remains fully compatible with older, high-end Canon Speedlites with a high-voltage socket for external battery packs. This new external battery pack will replace the previous CP-E4 battery pack in the Canon line. Like its predecessor, the updated Compact Battery Pack CP-E4N holds eight AA-size batteries, either alkaline or rechargeable Ni-MH type. It uses the same type of connector to the high-voltage input socket on Canon’s 500- and 600-series speedlites, so it can be used with not only the latest Speedlite 600EX II-RT, but the previous 600EX-RT, 580EX II, 580EX, and even the long-discontinued Speedlite 550EX. Upon first glance, this latest Compact Battery Pack appears identical to the previous CP-E4 version. However, there are some noteworthy changes. The CP-E4N is designed to be a “best-match” external battery pack to use with the latest Speedlite 600EX II-RT. Among the biggest changes in the updated speedlite are the increased number of continuous flashes that can be fired, and increased reliability in terms of heat resistance. The CP-E4N battery pack mirrors those refinements, offering demanding flash shooters a battery pack that’s designed to match the continuous shooting performance of this latest speedlite. • Re-designed, heat-resistant circuitry within the battery pack, to minimize internal heat build-up during rapid, continuous flash firing and recycling • Internal temperature sensors to detect dangerous levels of heat, and prevent circuitry from damage during continuous, high-demand shooting • Special external power supply detection circuit, which can be read by Speedlite 600EX II-RT — this allows the speedlite to take full advantage of CP-E4N battery pack’s additional continuous shooting capability. The compact battery pack concept Unchanged is the basic concept of the compact battery pack for high-end speedlites. With its eight AA-size batteries as a power supply, the idea is a pack that can noticeably cut flash recycle time, and extend the length of time a photographer can shoot with flash on-location or in the studio, before concerning him- or herself with needing to replace batteries. Without risk of damage from truly high-voltage external power (as might be the case, in some instances, with certain third-party battery packs for speedlites), and in a very compact package, the CP-E4N continues the idea of an external power supply that adds to a speedlite’s performance, in a pack that’s small enough to carry in a typical dress shirt pocket.
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