P91 with 2 IMR C cells is bad....

[bigchelis]

I been running my P91 with 2 IMR 18650's for about 5 hours on dog walks.

I tried the Fivemega 2C hosts with 2 Li-on KD cells and it worked for a long and bright 45 minute dog wallk.

Then I tried 2 IMR C cells and the lamp =

P91 and 2 IMR C cells is a bad idea.

 

[Niconical]

Thanks for letting us know.

It's always good to know these things, but a shame you had to take one for the team to find out

 

[Outdoors Fanatic]

I'd never try a P91 with those big *** IMRs... Nor any other SureFire HOLA, for that matter.

 

[RichS]

I'd never try a P91 with those big *** IMRs... Nor any other SureFire HOLA, for that matter.

What about the MN21? I was under the impression that 2xIMR 18650s would work great with that bulb. I was going to try it, but now I'm not so sure...

 

[Outdoors Fanatic]

What about the MN21? I was under the impression that 2xIMR 18650s would work great with that bulb. I was going to try it, but now I'm not so sure...

The original poster and I am referring to 'C' sized IMR cells, which is 26500. That's way larger than a 18650 cell. The MN21 will probably survive on a pair of 18650 IMRs, because its massive current draw will sag those cells, preventing heavily overdriving the bulb. 2x26500 IMRs, on the other hand, would definitely kill the MN21 instantly.

 

[maxspeeds]

I've blown a P91 with 2 IMR 16340 cells and AW's softstart. I slowly ramped it up to high, and It worked fine for 30 seconds, then Goes to show that even the small IMR cells can blow this lamp.

 

[pete7226]

Wa1111 works great hot off charger with my 2xAW C cells

Fm1794= just like P91

 

[Raoul_Duke]

What are you guys charging your IMR123's to ? :thinking:

4.1V or 4.2?

( I only take mine to 4.1V )

I was just about to have a blast at the P-91 and 2 x IMR123's just now before I saw this.

I run the Fm1794 in an E2D on 2 x IMR123's and havent had a problem...It is bright so was thinking hoping 2 x IMR123's was good, but maybee I have a little added resistance?

 

[bigchelis]

The P91 seemed to work fine with IMR 18650 cells. It was how MrGman took the lumen readings. I then keeped using it with those cells untill I took possesion of the fivemega 2c body.

It did work perfectly with the KD "C" li-0n cells. I then tried the IMR C cells and


At least I got around 6 hours using IMR 18650 cells:twothumbs

 

[Outdoors Fanatic]

Hey guys, check this video out:

http://www.youtube.com/watch?v=g8qg4LwcxDU

 

[bigchelis]

Hey guys, check this video out:

http://www.youtube.com/watch?v=g8qg4LwcxDU

This is the video that inspired me to run the P91 with IMR 18650's.

I just wish it would have survived the IMR C cells too.:candle:

 

[mdocod]

We have had plenty of reports of MN21s popping on 2xIMR18650s, which is why I believe that any of the SF HOLA lamps are going to be really hard to keep alive long on a pair of large IMR cells.

 

[cenz]

Wa1111 works great hot off charger with my 2xAW C cells

Fm1794= just like P91

wa1111 w/ big cell is nice~

did you mean blk-C or IMR? with AW softstart?

 

[pete7226]

Black AW C cells, no IMR or soft start