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p.3 #3 · p.3 #3 · Any on-camera flashes more powerful than 580ex? | |
woos wrote:
There aren't any tiny packs with voltages that high. You'd need step-up circuitry. The highest voltage battery cells you can buy (note, I said that you can go go buy, not what some scientist somewhere made lol )are high voltage lipo cells (that are slightly higher, by like .1 or .2 volts, than normal lipo cells).
Let's call them 4.3v max. They of course droop under load, like everything does. You'd need *at least* a 30S battery pack to reach your 125 number. Let's say that you found some factory in China that was making cells that would make (and the packaging *would* be by hand, mind you) you some TINY lipo cells and charge you a bunch because packaging 30+ tiny tiny cells over and over would be really annoying....
Nah, you could I suppose go and buy some of the commercially available packs around that voltage (they do exist). Of course, they are more reasonably sized. They can be small, but even small packs like that weigh a couple pounds usually....not something you'd be carrying around for use on an on camera flash ... I found some 6lb 96v packs, there you go. Doesn't sound too portable to me though. ^_^
And of course, manufacturers selling stuff over .. ahh i forget where the cutoff is, but it's somewhere around 50v..maybe it's 60v? I forget... well, they are going to be paranoid about safety because once you get above about 60 or so it can penetrate dry skin on most people.
Anyway, no. And the circuit in the flash doesn't care if its input voltage is 1.2 or 1.5, as long as there is enough charge left in the battery to fill it. So this entire thing is moot. I just wanted to point out the ridiculousness of it. :P
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The Canon CP-E2 uses 6 AA batteries and puts out 300 volts.
The Canon CP-E4 uses 8 AA batteries and puts out 300 volts.
There are also many third party packs that do exactly the same thing. They are all compact, light, and work very well for what they are intended.
From some of the posts here, it seems some people have no idea what high voltage battery packs are, and what they actually do.
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