NIWALKER VOSTRO BK-FA02 mt-g2 @ $125 GROUP BUY (shipping included) TERMINATED by Niwalker

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tatasal
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NIWALKER VOSTRO BK-FA02 mt-g2 @ $125 GROUP BUY (shipping included) TERMINATED by Niwalker

Hey guys, how about joining me in another Group Buy, this time for NIWALKER BK-FAO2 MT-G2 2,420 lumens. I’m in for unit # 1.

http://www.niwalkerlight.com/

$125@, including free worldwide shipping via Singpost registered airmail

Contact bill.qiao@163.com if interested

Also available, Crelant 7G10, @ $109, shipped too. Ask for coupon code

ATTENTION: This pre-order group buy has been cancelled due to MAP restrictions (supposedly), terminated by Niwalker

Edited by: tatasal on 09/27/2013 - 21:11
tjhabak
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Email sent!

djozz
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It looks like a great light that gets a lot out of a MT-G2 Smile. Love to see beamshots, 70klux throw with a huge hotspot must be impressive. It looks good too!

Don't have the money though Frown

tatasal
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I have been on the fence on what MT-G2 light to choose (7G10, S2200 and then this) IMO, the Niwalker brand is the most well-made among the 3, it has a magnetic rotary switch like the TN31, and a 2420 lumen output in a single led light. Huge hotspot as you said, very nice combination of throw and brightness.

zelee
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me want it,but wallet say otherwise :_(
already spend my money buying Roche M170 + 4×18650 panasonic,do i make good decision?

tatasal
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zelee wrote:
me want it,but wallet say otherwise :_( already spend my money buying Roche M170 + 4×18650 panasonic,do i make good decision?

I have that too, very nice light, good decision.

zelee
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mine still on their way and i chose NW tint.
what about yours? Smile

ryansoh3
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Video review by Selfbuilt is here:

CPF review page:

http://www.candlepowerforums.com/vb/showthread.php?361546-Niwalker-Black...(XM-L2)-BK-FA02-(MT-G2)-4×18650-Review-BEAMS

BLF ≠ B-grade Flashlight Forum

 

zelee
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i want to know how much the price when it available at fasttech :bigsmile:

tatasal
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Ryansoh3:

I think Selfbuilt’s video review is the pre-production version. The production version is a revised 02 and has a constant-current circuit design for constant output, among others.

http://www.niwalkerlight.com/

jmpaul320
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this is a really nice light!

Would you mind keeping the wrong flashlight?
Best wish, May
Tmart service team

 

Soumil wrote:

PLEASE HELP ME GEARBEsT! IM LITERALLY CRYING!

 

ryansoh3
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tatasal wrote:
Ryansoh3:

I think Selfbuilt’s video review is the pre-production version. The production version is a revised 02 and has a constant-current circuit design for constant output, among others.

Thanks for pointing that out. Smile

BLF ≠ B-grade Flashlight Forum

 

Woody
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tatasal wrote:

I think Selfbuilt’s video review is the pre-production version. The production version is a revised 02 and has a constant-current circuit design for constant output, among others.

The production version also has a lanyard attachment point, and a slightly wider magnetic control ring – two points Selfbuilt commented on.

Thanks for the info on this tatasal. Great price.

FMcamaroZ28
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Going to subscribe and think about it, but ill probably be in

Stereodude
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tatasal wrote:
The production version is a revised 02 and has a constant-current circuit design for constant output, among others.
How do you know that?
tatasal
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Stereodude wrote:
tatasal wrote:
The production version is a revised 02 and has a constant-current circuit design for constant output, among others.
How do you know that?

Niwalker says so.

http://www.niwalkerlight.com/

jmpaul320
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is it possible to have a driver that stays in regulation with the mtg2 with a 2s2p configuration?

Would you mind keeping the wrong flashlight?
Best wish, May
Tmart service team

 

Soumil wrote:

PLEASE HELP ME GEARBEsT! IM LITERALLY CRYING!

 

djozz
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jmpaul320 wrote:
is it possible to have a driver that stays in regulation with the mtg2 with a 2s2p configuration?

Some quick and dirty calculations, please correct me on mistakes: The MT-G2 has a Vf that is about 6.5 V at 4A current (this is my led-current guess in this flashlight), various resistances in the flaslight eat say 0.3V, the driver may eat another 0.1V so two batteries in series must deliver 6.9V under load. A popular Li-ion (Panasonic NCR18650B Protected 3400mAh) under 0.5x4=2A (there are two series, so 2A per serie) load stays over 6.9:2=3.45V for over 50 minutes.

So I'd say yes, a driver can be be had that keeps the light in regulation for quite some time.

jmpaul320
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djozz wrote:

jmpaul320 wrote:
is it possible to have a driver that stays in regulation with the mtg2 with a 2s2p configuration?

Some quick and dirty calculations, please correct me on mistakes: The MT-G2 has a Vf that is about 6.5 V at 4A current (this is my led-current guess in this flashlight), various resistances in the flaslight eat say 0.3V, the driver may eat another 0.1V so two batteries in series must deliver 6.9V under load. A popular Li-ion (Panasonic NCR18650B Protected 3400mAh) under 0.5×4=2A (there are two series, so 2A per serie) load stays over 6.9:2=3.45V for over 50 minutes.

So I’d say yes, a driver can be be had that keeps the light in regulation for quite some time.

ok – thanks for the explanation – thats what i was thinking

Would you mind keeping the wrong flashlight?
Best wish, May
Tmart service team

 

Soumil wrote:

PLEASE HELP ME GEARBEsT! IM LITERALLY CRYING!

 

ohaya
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Hi,

The Niwalker page says this has an SMO reflector:

http://www.niwalkerlight.com/content/?266.html

Is that correct?

tatasal
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ohaya wrote:
Hi,

The Niwalker page says this has an SMO reflector:

http://www.niwalkerlight.com/content/?266.html

Is that correct?

In Selfbuilt’s review, it does have a smooth reflector too:

http://www.candlepowerforums.com/vb/showthread.php?361546-Niwalker-Black...(XM-L2)-BK-FA02-(MT-G2)-4×18650-Review-BEAMS

Stereodude
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tatasal wrote:
Niwalker says so.

http://www.niwalkerlight.com/

I’m not trying to be obtuse, but I must be missing something. Their website doesn’t say anything about changes from the versions Selfbuilt tested. Yes, it lists constant current as a feature, but that doesn’t mean it really has it in the sense the FA01 does, or that the shipping FA02 is going to perform differently from the one Selfbuilt reviewed.
Stereodude
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jmpaul320 wrote:
is it possible to have a driver that stays in regulation with the mtg2 with a 2s2p configuration?
Yes, easily. Even if they’re using the 6V MT-G2 (which we don’t know). You can do a buck/boost on a 6V MT-G2. Or a boost circuit on a 9V or 36V MT-G2.
InfinitusEquitas
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Thanks for the heads up... will enjoy adding this light to my collection.

tatasal
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Stereodude wrote:
tatasal wrote:
Niwalker says so.

http://www.niwalkerlight.com/

I’m not trying to be obtuse, but I must be missing something. Their website doesn’t say anything about changes from the versions Selfbuilt tested. Yes, it lists constant current as a feature, but that doesn’t mean it really has it in the sense the FA01 does, or that the shipping FA02 is going to perform differently from the one Selfbuilt reviewed.

I have sent an email to Bill and to Niwalker’s technical regarding this concern.

RedForest UK
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tatasal wrote:
Ryansoh3:

I think Selfbuilt’s video review is the pre-production version. The production version is a revised 02 and has a constant-current circuit design for constant output, among others.

http://www.niwalkerlight.com/

Are you sure they changed it to a boost/buck? I thought they claimed constant output even on the pre-production version.

jmpaul320
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RedForest UK wrote:
tatasal wrote:
Ryansoh3:

I think Selfbuilt’s video review is the pre-production version. The production version is a revised 02 and has a constant-current circuit design for constant output, among others.

http://www.niwalkerlight.com/

Are you sure they changed it to a boost/buck? I thought they claimed constant output even on the pre-production version.

they claimed constant current to begin with as far as i know

Would you mind keeping the wrong flashlight?
Best wish, May
Tmart service team

 

Soumil wrote:

PLEASE HELP ME GEARBEsT! IM LITERALLY CRYING!

 

tatasal
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I have sent a pm to Selfbuilt on what he has to say regarding this light coming out of the factory compared to the one in his review.

tatasal
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Selfbuilt has replied and he said he has not gotten a production version of this light, so he can’t say about the differences.. In his review he said the one he had was an engineering sample, a pre-production version. He further added that if hears anything from the factory, he will post it in his thread of flashlight reviews.

Rockspider
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Not sure to understand what I have to do if interested...

That bill.something email address is Tatasal or is someone from Niwalker or another seller altogether...?

Have I to write to that email some reference to tatasal, to BLF, a coupon?...

tatasal
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Rockspider wrote:

Not sure to understand what I have to do if interested…

That bill.something email address is Tatasal or is someone from Niwalker or another seller altogether…?

Have I to write to that email some reference to tatasal, to BLF, a coupon?…

It’s like this…I negotiated with Bill (bill.qiao@163.com) that if I organize a group buy for this light, how much will be his lowest price to us, flashlight enthusiasts. Someone in the other other forum has mentioned a retail price of $174. His price for this group buy is $125, shipped via HK or Singpost. (no more coupon code necessary)

Anyway, as stated in the OP, anyone interested to join, or just ask clarificatory questions, to this group buy, just email Bill.
In short, I am the organizer of this group buy, Bill is the seller, and orders be transacted directly to him. I’m just customer # 1 in the list. Thanks

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