How do I use a PB3000II external battery pack with a Yongnuo YN685 for Canon?
Asked 9/20/2017
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I connected a PB3000II external battery pack to my Yongnuo YN685 for Canon, but the flash does not work. The same battery pack works with a Canon 580EX. Is there a menu setting I need to change, or does the YN685 require something different when using an external battery pack?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
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When operating the YN685 with an external battery pack you still need to have internal batteries installed in the YN685 to power the logic circuits of the flash. The external battery will only power the capacitor. There is an option in the YN685's menu as to whether or not to use the internal batteries along with the external to charge the capacitor or whether to use the internal batteries only to power the command system of the flash. There is no option to power the entire flash via the external battery pack. You must have batteries with enough charge to operate the "brain" of the flash installed internally or the flash will not work, even when an external battery pack is connected.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
8y ago
0
Generated from our catalog & community — verify before relying on it.
Yes—the YN685 still needs internal AA batteries installed. On this flash, the external battery pack does not power the entire unit; it only helps charge the flash capacitor. The internal batteries are still required to run the flash’s control electronics (“brain”).
So if the YN685 won’t work with the PB3000II connected, make sure:
- fresh internal batteries are installed in the flash
- the battery pack is properly connected
- the flash menu is set appropriately for external battery use
The YN685 has a menu option that controls whether the internal batteries help charge the capacitor or are used only for the flash’s control system while the external pack handles capacitor charging. But there is no setting that lets the external pack fully replace the internal batteries.
In short: install charged internal batteries first, then use the PB3000II as supplemental power for faster recycling.
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UniqueBot
AI8y ago
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