ROP - Is there any point?

[uknewbie]

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[deranged_coder]

... I don't have any NiMH re-chargeable batteries yet, so I just used some off the shelf Duracell Alkalines, just to see it working in the meantime.
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Would the NiMH batteries make any difference to this, or is this just as good as it gets in standard ROP world?

My understanding (and I am no expert) is that NiMH batteries allow for a higher current draw than alkalines so it is likely that you will see a difference if you went from alkalines to NiMH batteries. :thinking:

And since you are talking about the ROP you might get a more knowledgeable response over in the incandescent flashlights forum... :shrug:

 

[AxeMan]

NiMH cells will make a MASSIVE difference. Alkalines can't deliver the current that those bulbs need. I have an ROP and a Fenix T1 (basically the same light as the Tk10/Tk11), and I can tell you there's just no contest in output.

 

[nbp]

The ROP is generally built with a 2D maglite, and the 2 D cells are replaced with 6 NiMH AA cells (such as Eneloops). With this setup you will get 700-800 lumens IIRC. Your Fenix is NOT putting that out!!

When I light up my ROP I go like this 😀 :huh:

 

[uknewbie]

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[nbp]

Here are some threads on incan mods and ROPs. If you're gonna build a ROP, I think you're better off dumping the 6D, and getting a 2D mag, a 2D>6AA adaptor from members mdocod or fivemega, a half dozen eneloops, and then have some fun!

Here and here and here

and here for current draws....look at the bottom of the superbulbs list

 

[AxeMan]

I don't know what the alkalines max out at, current-wise, but the stock bulbs all draw less than 1 amp. The ROP high draws around 4 amps, which is way more than the alkalines can handle.

By the way, I see you got a glass lens, but do you have a metal reflector for your ROP? That bulb gets hot enough to melt the plastic one.

 

[Mr Happy]

If you have a 6D Mag, you can put six D size nicads in there and get much better run time than with six AA NiMH in a 2D host. It depends whether you want the small size or not. D size nicads are less expensive and easier to charge than D size NiMH.

 

[Gunner12]

NiMh batteries can take much more current then the alkaline batteries and should give you both more output and runtime.

IIRC the ROP low draws around 1 amp and the high draws 4-4.5 amps.

 

[paulr]

NiMh batteries can take much more current then the alkaline batteries and should give you both more output and runtime.

IIRC the ROP low draws around 1 amp and the high draws 4-4.5 amps.

Most AA NiMH can't comfortably supply that much current either. You want to use high current ones.

 

[yellow]

Forget the size, weight, durability argument.

hey Craig
right on the durability because all the "better" led lights are much more robust than an incan,
but size and weight cant be forgotten, they simply are there

depends on the uses:
big and heavy and brutally bright (Ni-Mh) light with short runtime to impress ppl, or for very short "throw" bursts,
or still astoundingly bright for a nothingweighting, supersmall flashlight with 4 times the runtime and additional lower output modes

with the upcoming of quality multiemitters in the near future, lets talk again, imho You are prone to get one 😉

 

[jake25]

My 2D ROP-Hi Absolutely destroys any of my ~250 Lumen CREE's.

Try building it with a FM 2d--> 6AA, Borofloat lens, Cammed reflector, and try some resistance mods.

 

[Crenshaw]

IMHO, skip the Nimh and go stright to two C li-on cells in a Mag 2C

Crenshaw

 

[uknewbie]

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[camaro09]

I have a P7 and tried to use Alkalines... BIG mistake. Light was dim in no time. I got some 10000Mah Nimh D batteries and now works wonderfully. You will be happy with your, Im assuming you ment 12000Mah not 1200Mah Nimh.

I think people are just suggesting a 2D host because its alot smaller than a 6D. But like you said you already have one and dont care about size. Use your 6D, you will love it. Also If you were to use a 2D you would have to use Li-on batteries to get enough voltage. And unless your fimilar with Li-on batteries I have heard to stay clear because they can be dangerous.

If Im wrong anyone feel free to correct me.

 

[Wattnot]

IMHO, skip the Nimh and go stright to two C li-on cells in a Mag 2C

Crenshaw

Big + 1 on this plan. I'm using two AW C cell sized lithium ion batteries and the extender ring. I like it more than my Mag 85. While it's not as bright, it's significantly smaller, has double the runtime with the HIGH lamp and probably 4 times with the low and as Austin Powers would say, "It's dead sexy."

The beam is very comparable to the Surefire M6 with the MN21. I wouldn't say this out loud but I even like it better!:kiss:

 

[Bullet Bob]

One of my most favorite lights and very impressive is my 2d ROP low. the body is bored for a FM quad battery holder that holds 8 aa batteries. I am running 7 eneloops and one dummy cell and I have a UCL lens and a FM cammed reflector in this setup. Talk about output and runtime this form factor and combo is hard to beat. Much more impressive than those top photos. That seventh cell makes a big differance in output on the low ROP.

 

[divine]

I wasn't very impressed by my 6D ROP, for the size, a 2D ROP or 2C ROP is more impressive.

 

[ktafil]

Exactly what I wanted to hear, thanks!
What kind of current does that bulb draw, what is the difference with Alkaline/NiMH?
Craig.

I measured my
2D>6AA ROP --> 4.2Amp (6x full AA batteries 2850mAh)
4D ROP --> 4.5Amp (6x full Sub-C batteries 5000mAh)

Note, search for "low resistance fix" and mod your switch to get these amps.
On the 2D I got 3.9Amp without the low resistance fix.

 

[uknewbie]

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