Speedlite & Battery Pack

Thanks Phil. I have ~30 yet-to-be Adult version Eneloop and never have problem with them so I might just stick with the same type to keep it simple.

Likewise (except 96 precocious, pre-teenage Eneloops).
Problems? Aren't those the things that folks using other, less satisfactory rechargeables have? Didn't realise you could have them with Eneloops - that must have been hypothetical.

As for the low voltage option for external batteries, Quantum used to make some batteries that supplied the low voltage. They also made cable with the dummy batteries that fit into the speedlite. It required cutting a slot in the battery cover to accommodate the cable as I recall.

Cables may be available via eBay, or even Quantum. However, as Phil points out proceed with care.

Tigerkn wrote in post #15986231
Please help me to know if there is a way to use the battery pack (8 cells) without loading 4 cells in the Speedlites?
Thanks!

The high Voltage ports these external packs plug into expect the flash power capacitors to be fed directly at Voltages in the 300 Volt range. This is why they recycle the flash so quickly.

But, these external packs do NOT substitute for the low Voltage (5 or 6 Volts) provided by the cells inside the flash that powers the other sundry systems required for flash function.

These packs are not just external battery holders meant to replace or supplement the internal cells low Voltage of 5 or 6 Volts. The external pack have circuits that convert the Voltage from the 5 to 12 Volts provided by the 8 cells in the external pack to somewhere in the 300 Volt range commensurate with the expectations for that 300 Volt external port on the flash.

Enjoy! Lon

I've opened up a Canon, a Yongnou and a Pixel battery pack. They all contain transformers. They are not physically large but obviously perform a voltage conversion function. As stated from 8x1.5 to 300+ volts.

dmward wrote in post #16000757
I've opened up a Canon, a Yongnou and a Pixel battery pack. They all contain transformers. They are not physically large but obviously perform a voltage conversion function. As stated from 8x1.5 to 300+ volts.

AC transformers, right ? how many Amps ?

I need to know specific voltage and Amps,
I need to replicate Quantum battery pack using custom made power circuit with bigger Amps
connected to Lithium battery

did some testing and can not find exact voltage, results vary between 280V to 320V

Tigerkn wrote in post #15986231
Please help me to know if there is a way to use the battery pack (8 cells) without loading 4 cells in the Speedlites?
Thanks!

if you have guts to open 580EX II or 600EX,
you could search for the battery terminal + and -,
and make your own circuit, something like 14,6V DC to 6V DC

I did this to Metz 50AF and success

dmward wrote in post #16000757
I've opened up a Canon, a Yongnou and a Pixel battery pack. They all contain transformers. They are not physically large but obviously perform a voltage conversion function. As stated from 8x1.5 to 300+ volts.

The battery packs use standard cycling voltage-doubling circuitry, using a transformer, diode network and capacitors. I use the Pixel packs because they have twin circuits, making the pack-ready time shorter, and provides the ability for the pack to work with just one of the two trays of 4 batteries.

And then there is the squelch function reacting to the thiid-wire control line in the cable to the flash. AFAIK, this is not available via the battery compartment in the flash. So, you can provide extra power at 6 volts through the battery port, or 300v ready-to-go but fully engineered through the battery-pack connector.

The former gives extended shooting but not fast recovery; the latter gives about double shooting (600 fuill shots) but 1.2 sec recharge time, with my Pixels and Powerex batteries.