580 EX II external battery

[ejm20]

would like recommendations for an external battery pack for a 580EX II.    Any thougths on the Nissin PS8?

Thanks

[John_]

Of course, there is the Canon CP-E4 and then there is an off-brand JJC that makes them for a fraction of the cost of a Canon. They use 8, AA batteries

[ejm20]

would prefer a rechargable unit.   Theres Flashpointt, Nissin and Quantum which is a bit expensive.   Probably others.

[MikeSowsun]

---

@Kertzmann wrote:

The 580EX II has an external battery pack connector. If you can figure out what voltage and ampers it accepts you could mod a suitable 12v wall charger to fit.

---

The connection uses 300 volts and uses a complicated control circuit. You can't build one yourself or mod any 12v source.