Rechargeables in SB30 Speedlights


karnage

Senior Member
Feb 26, 2005
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Hi folks! It's been some years since I last posted on this forum. Haven't had time for much photography, but trying to get back into it.

So a rather niche question: anyone has any experience with the old SB-30 Speedlights using rechargeable CR123A batteries? Usually, these are 3.7V nominal and go up to about 4.2V freshly charged. Will it fry the circuits?

Thanks guys!
 

Madmax

Senior Member
Nov 22, 2003
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And I thought my SB800 is old.

I am not a electrical expert. I tested my AA cells and got different voltage. I think it would work fine on your flash as I believed 0.5V will not fry the circuits.
 

karnage

Senior Member
Feb 26, 2005
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Thanks, Madmax! Haha! I got SB800 too. :p

Actually, my concern was not the nominal voltage at 3.6V. Rather, the full fresh charge voltage of 4.2V is more my concern.

Truth be told, I tested with a few pops of the flash and it seems to work, but I'm not sure in the long run will it be bad for the circuits.