Rechargeable 123 burns out 6P bulb

[clyons]

Stopped in at Battery Plus yesterday to pick up a rebuilt battery pack for my signal meter and noticed they had 123 rechargeable batteries and a charger set with home and auto chargers. Brought it home and charged the first set up and tried the light and /ubbthreads/images/graemlins/mad.gif light came on for 1/2 sec fried the bulb. Anyone had this problem? What are the mAh rating on normal 123 batteries? The markings on the battery case are ICR 17335 650mAh 3.7v

 

[Xenon]

You should be looking at the voltage instead of the mAh in this case. Putting in two R123 in a 6P results in a total voltage of more than the required 6V for a P60/P61 bulb.

If your cells are freshly charged, in your case the total voltage could be (4.2v x 2) = 8.4v! That explains why your bulb was fried in 1/2 sec.

You should use a P90/P91 instead in your 6P.

 

[JonSidneyB]

Those are also bare cells. I think the ones they have were to ones I had made up and completed in February of last year. The only thing they have in them are short protection. I could have been selling those things for a year and chose not to.

2 of these will run a 9volt light. Way to much power for a standard 6volt lamp.

 

[clyons]

Guess I'll find another use for the batteries. Any thoughts on usage?

 

[JonSidneyB]

I would only use them in lights that will protect the battery since they are bare cells like the HDS lights.

 

[glockboy]

buy a p90 lamp and put it in a 6p.

 

[wei]

there is a kind of Ni-MH rechargeable battery, CR123A size, 2.9V(two NI-MH cells), 500mah, this is suitable for your 6P, and more safety.

 

[Joseph]

[ QUOTE ]
wei said:
there is a kind of Ni-MH rechargeable battery, CR123A size, 2.9V(two NI-MH cells), 500mah, this is suitable for your 6P, and more safety.

[/ QUOTE ]

Where did you get them? How long do they run in 6P?

 

[wquiles]

I can tell you that using two of those batteries and running a P90 bulb is a GREAT combo. One of my favorite lights due to being small (only 2 cells required) and being bright /ubbthreads/images/graemlins/grin.gif

Will

 

[wei]

i can buy this in china, i don't know if this sales in US. try search.
this is how it looks like:

 

[Gene]

Glockboy and Will,
That's the first I've read of anyone suggesting running a P90 on two of Jon's 4.2V 123R's! What a great idea! You'd have a 9P in a 6P/G2/G2Z package and should be a lot brighter than even using a P61.

 

[Topper]

I am using them in a silver pelican M6 (so I don't get confused) with the P90 has worked fine so far.
Topper /ubbthreads/images/graemlins/smile.gif

 

[wei]

3V CR123A --1300mah (generally)
if you want to use 16340 Li-on in your 6P, buy a P90
if you want to use 17670 Li-on in your 6P, buy a 3.7V wolfeye lamp.

 

[KevinL]

[ QUOTE ]
Gene said:
Glockboy and Will,
That's the first I've read of anyone suggesting running a P90 on two of Jon's 4.2V 123R's! What a great idea! You'd have a 9P in a 6P/G2/G2Z package and should be a lot brighter than even using a P61.

[/ QUOTE ]

Project C2-90 did it, first generation protected JSB R123 cells. You do get rated output from the P90, however, the P61 is still a little brighter.

I recommend metal lights if you want to be able to do complete discharges of up to 25-30 minutes, they get SERIOUSLY hot, hence my use of a C2.

 

[Gene]

Since clyons inquiry has been answered, I'll continue with the 123R/P90 discussion as I won't be hijacking his thread.

Hi Kevin. Thanks for link and I missed that but of course it's a full time job just keeping up with what goes on here. /ubbthreads/images/graemlins/smile.gif So your're saying the 2X4.2V 123R's using a P90 ISN'T as bright as using the P61? Then the main advantage with this 2x123R/P90 conversion is that you can use the 123 4.2V rechargeables?

 

[KevinL]

Yup, you're right - sleep for a couple of days and you've missed all the good stuff on CPF. /ubbthreads/images/graemlins/grin.gif it's great to have a community as active as this one, but it makes keeping up with them a little difficult.

The Surefire P90 on its 'intended configuration' - 3xCR123 - is only 105 lumens, whereas the P61 as it was intended to be run is 120 lumens. You're right, the main advantage is that the P90 is friendly towards 2xR123. I think of it as offering just a little bit more runtime (25-30 min in my experience) than the P61 while packing a serious punch in a 2-cell 123 light.

 

[Gene]

Thanks Kevin. I'm going to go ahead and try it using a G2 with a G2Z head that I'm now running a P61 in. I know it'll get hot but I can't imagine it getting much hotter than using the P61 and I don't think the Nitrolon will melt. We'll see! /ubbthreads/images/graemlins/help.gif

 

[FlaRe]

Will a P91 melt the lens of a stock G2?

Will it cause the head to deform?

 

[socom1970]

Absolutely. The P90 and P91 will both melt the polycarbonate window. I found that out the hard way. I'm not sure if the head will deform, but you will eventually see a round distortion develop within the polycarbonate. It was not designed for the higher output LA's. At least get a G2Z Bezel instead. It has the Pyrex window and the Nitrolon shell. However, If you plan on using the P91, I would strongly suggest getting the M2 Bezel. Pyrex window, HA aluminum head with cooling fins. (If you don't mind it being aluminum)

 

[Gene]

Both of my G2's have glass lenses, in fact one is the G2Z bezel with the Pyrex. I wouldn't even think of trying the P90/2X4.2V R123's with a Lexan lens. I know it'll get very hot but I'm pretty sure the Nitrolon can take 5-10 minute blasts. I'm waiting for the P90 LA and I'll try it out and see what happens and report back.