RCR's in Quark make it brighter

I don't have a lighter meter to test with. But I have a set of 4Sevens Primaries, Surefire Primaries, and AW Protected RCR's... Will the 3.7V RCR123's make a Quark 2x123 R5 brighter in general or no. By the naked eye it looks about the same, but I've seen runtime/output graphs showing what it appears to be brighter with 3.7v batteries, although not by much.

Anyone confirm?

In a 123x2 - no - two rcr's don't make a difference.

In a single 123 or AA yes, you get a good boost when using a li-ion cell.

Ok thanks for the conformation, I was thinking if anything it can't be any difference, at least nothing worth bragging about.

amigafan2003 said:

In a 123x2 - no - two rcr's don't make a difference.

In a single 123 or AA yes, you get a good boost when using a li-ion cell.

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How about two IMR 16340 in a Quark 123 X 2? Would it go into direct drive and run brighter?

amigafan2003 said:

In a 123x2 - no - two rcr's don't make a difference.

In a single 123 or AA yes, you get a good boost when using a li-ion cell.

Click to expand...

That is only partial correct. The light uses a buck/boost converter that will keep constant output for any voltage above 2.4 volt. I.e. 2xAA, 1xCR123 and 1xLiIon will have same output.

recDNA said:

How about two IMR 16340 in a Quark 123 X 2? Would it go into direct drive and run brighter?

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you just quoted your answer.

Ragiska said:

you just quoted your answer.

Click to expand...

What???

recDNA said:

amigafan2003 said:

In a 123x2 - no - two rcr's don't make a difference.

In a single 123 or AA yes, you get a good boost when using a li-ion cell.

Click to expand...

How about two IMR 16340 in a Quark 123 X 2? Would it go into direct drive and run brighter?

Click to expand...

Ragiska said:

you just quoted your answer.

Click to expand...

recDNA said:

What???

Click to expand...

the bold that you quoted above is the answer to the question you asked. no, rcr's won't make the 123x2 brighter.

I run a 17670 protected AW in my 123x2 for extended run time over two cells.

That is only partial correct. The light uses a buck/boost converter that will keep constant output for any voltage above 2.4 volt. I.e. 2xAA, 1xCR123 and 1xLiIon will have same output.

Click to expand...

No - the 123x2 (3v-9v) heads are Buck only. The 0.9v-4.2v heads are buck/boost but the OP didn't ask about those so I didn't comment on them.

How about two IMR 16340 in a Quark 123 X 2? Would it go into direct drive and run brighter?

Click to expand...

No, they are nearer to the voltage of 2xCR123A's than RCR123's - why would you think it would go direct drive?

amigafan2003 said:

No - the 123x2 (3v-9v) heads are Buck only. The 0.9v-4.2v heads are buck/boost but the OP didn't ask about those so I didn't comment on them.

No, they are nearer to the voltage of 2xCR123A's than RCR123's - why would you think it would go direct drive?

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No, 2x IMRs have an even higher voltage than 2x RCRs

Under 1 amp fully charged,

2x RCR ~ 7.6V
2x IMR ~ 8.1V
2x CR123 ~ 5V
2x IFR ~ 6.4V

You probably mixed IMRs up with the IFR (LiFePO4s).

Do 4.2v RCR's drop to 3.8v when they are running?

JaguarDave-in-Oz said:

Do 4.2v RCR's drop to 3.8v when they are running?

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Here is a curve from a18650 battery, A 16340 battery will have the same voltage drop, just at a lower load current (These curves here are 0.3, 1 and 3A):

Ragiska said:

the bold that you quoted above is the answer to the question you asked. no, rcr's won't make the 123x2 brighter.

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IMR isn't the same as RCR.

This IMR vs RCR talk is quickly becoming confusing.

You probably mixed IMRs up with the IFR (LiFePO4s).

Click to expand...

You are correct. Still, a 123x2 wont be any brighter with IMR's

recDNA said:

IMR isn't the same as RCR.

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"rcr" is a generic term, so yes they are. "rcr" doesn't refer to a specific chemistry. but IMR and LiCo rcr's both they have a similar voltage also, so again...

and direct drive at 8+V is rediculous. you would let the magic smoke out.

but you very simply could have just looked at the specs.