Anyone tried a FM 1794 with 2 LiCo D cells?

[mudman cj]

I know many have used the FM 1794 bulb with AW C cells of LiCo chemistry without soft start to great success. Has anyone tried one with a pair of D cells of LiCo chemistry without soft start? It seems that this combo would push this bulb to the limit, so I would expect a relatively short bulb life, but will it instaflash? Speculation will not help here folks - I am asking for experiences. And I already know that the cells could be undercharged to improve the odds. My question pertains to fully charged D cells. Thanks in advance to anyone that took a chance and gave this a shot. :thumbsup:

 

[DM51]

In LuxLuthor's testing they flashed at 7.9V, so my guess is...

LOL

 

[mudman cj]

Yeah, mine too. But I'm still hoping the cells sag just enough. :green:

 

[gswitter]

As I recall, FM recommends only charging the cells to 4.1V. Every 1794 I tried with fully charged cells ed, even protected 18500s.

 

[mudman cj]

Oh - I missed that recommendation. Thanks for the info. You just saved me some bulbs. I surely would have tried to use two AW C cells right off the bat, and odds are I would have thought to charge them up first.

 

[pete7226]

Never had a problem with this bulb and 18650's, on AW C cells it flashed immediately.

 

[labrat]

Sanyo 18650 cells, resting 24 hours after full charge, voltage reading 4.20 before putting them in the light.
One 1794 went out with a bright flash!
I have several pairs of cells, so after this I let them rest a week after charge, and no problems.