Quark Turbo QB2L-X - 17670 or 2 x 14500

polymath · Dec 14, 2012

I have a Quark Turbo-X QB2L-X on the way and will order some batteries for it today.

Is there any advantage to feeding it from two 14500's as opposed to one 17670? Runtime? Brightness? :thinking:

I have an extra AA body tube and I was going to buy some 14500's anyway for a Quark QP2A-X that I have on the way also.

ETA: The QB2L-X is the Turbo X 2x123 - so, high voltage head.

GordoJones88 · Dec 14, 2012

The Turbo X head has a buck circuit, so running just a single cell Lion produces the same brightness. I run my Turbo X Stubby with a single-cell 123 body and turbo flat tail cap.

polymath · Dec 14, 2012

So, two 750 mAh 14500's would not have much runtime advantage over a 1600 mAh 17670, correct?

It sounds like I should go with the single 17670 and avoid the possible issues with mismatch pairs.

Does the Turbo-X have a low voltage cutoff? I am just wondering whether to go with protected or unprotected 17670's.

reppans · Dec 14, 2012

I would still get a protected 17670, you may want to lego it with the low voltage head at some point. Actually, that's what I do... and I do use 2x14500s in the Turbo X - guess its just that head/body proportions just seem better that way.

The Turbo X does not seem to have a hard cut-off, but you will lose the higher modes below 3V. 2 charged Eneloops will power M,L,ML and near empty will power ML (if I recall correctly).

But yeah, with two cells, you have to monitor balance.

polymath · Dec 14, 2012

Well, I ordered 3 protected AW 14500's and 3 protected AW 17670's.

My plan is to power the Quark Pro X with a single 14500.

I will play around with the 2 x 14500 vs 17670 in the Turbo X.

pjandyho · Dec 14, 2012

There are some inconsistencies with Quark's machining in regards to the inner diameter. Some of my samples take protected AW 17670 and some don't. My turbo does not. Just an FYI.

polymath · Dec 15, 2012

I suspected that might be the case. I am prepared with a wood dowel and sandpaper. Worst case, I will use a friend's lathe and take a few thou off the inside.

pjandyho · Dec 15, 2012

All the best! I guess I should do the same too for those that does not accept 17670 but I am too freaking lazy.

roadkill1109 · Dec 15, 2012

No it doesnt. It will drain that baby to zero volts, so better get those grey protected ultrafires or AW's. I can vouch for the grey protected ultrafires coz i've been using them in my turbo x for about a year now.

Quark Turbo QB2L-X - 17670 or 2 x 14500

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