External Flash Battery Pack for Canon 580EX II 550 - $110

External Flash Light Battery Pack for Canon 580EX II 550EX Compact Battery Pack SF-17

External power source for a higher flash capacity. It speeds up the recycle time by 60-75% and utilizes 6x AA batteries as its power source.

Features:

-Protective Case: Protective soft case can be worn on belt or put in a bag; light and easy to carry. The one-way connector plug is designed to avoid mis-connections which can lead to flash unit damage.

1/4'' Thread Screw: Standard thread for tripod mount.

-Performance: The Pack reduces recycling time to less than half of a normal cycle and can give up to double the amount of flashes as the original ( a ). It is suitable for continuous flash use ( b ).

-Convenience: The Pack uses 6 AA batteries (same batteries as flash) and with different connecting plugs, supports most Canon flashes to greatly increase flash capacity. Its ideal for the professional.

Product dimensions: 69mm(w)x158mm(h)x25mm(d)
Net weight: 170g

Operating Temperature range: 0oC-40oC

Suits: Canon 580EXII 580EX, 550EX, MR-14EX, MT-24EX

Package Includes:
1 x External Flash Battery Pack (batteries not included),
1 x padded protective case,
1 x inch screw adaptor & English and Chinese instructions.

Note:
a, Depending on state of battery charge;
b, Maximum of 15 consecutive shots without break or risk of overheating

Suitable replacement for CP-E4 CP-E3