Introducing the Surefire U2-S...

grnamin · Nov 10, 2006

"S" stands for "stubby" or "shorty".

Take a U2 head and slap on a Surefire A21 adapter, and voila! You have a U2-S:

...and yes, it does work (with 1xR123)

I don't know what the runtime is, though.

glockboy · Nov 10, 2006

Cool, I like it.

joema · Nov 10, 2006

Looks like a very interesting experiment. Has nobody else tried this?

I'd expect the run time at max output to be quite short, since a single R123 has less capacity than a primary cell, and you only have one cell vs the normal two.

Ty_Bower · Nov 10, 2006

I'd think it would run about the same length of time as a TW4 on a R123. Both the U2 (on max) and the KL4 draw about the same amount of current, give or take depending on the lottery.

Manzerick · Nov 10, 2006

What a great idea!!!!!!

grnamin · Nov 10, 2006

Ty_Bower said:
I'd think it would run about the same length of time as a TW4 on a R123. Both the U2 (on max) and the KL4 draw about the same amount of current, give or take depending on the lottery.

Maybe if a WW0S was installed into a U2-S, it might have slightly better runtime?

rollee · Nov 10, 2006

i like it.

WAVE_PARTICLE · Nov 10, 2006

VERY COOL! Thanks for this great idea!

Visible EM Wave · Nov 10, 2006

Wow, that looks cool. I really want one. It's similar to putting a KL4 on a E1e/E1L body. I always like my L4-S too!

Kiessling · Nov 10, 2006

WOW !!!!
Did you try it on 1xCR123 primary cells?
I like that !!!
bernie

Visible EM Wave · Nov 10, 2006

Where can I get a A21? I'm sure it will soon be out of stock because of this thread. :laughing:

Archangel · Nov 10, 2006

25min on level 6 doesn't seem unreasonable for a top shelf cell. Even if it's only 20, that's going on an hour and a half at level 4 and over five at level 2. (I got lazy and ordered mine from Surefire.)

jtice · Nov 10, 2006

oo:

Sweeeeeet !
I have a 1 cell extender from LightHound, wonder if that will work. :thinking:

I really like that !!!
are you getting full Level 6 off just one cell though?

What would be cool also, is a Pila 150 sized pack that is twistie,
that would be about the same size, but have good runtime.

~John

greensilverado · Nov 10, 2006

i looked at surefire's site but couldn't find the "a21". Lighthound does carry single cell extenders for "c" series lights. i wonder if it is the same. the threads are outside on one end and inside on the other end.

just my 2 cents :grin2:

grnamin · Nov 10, 2006

Kiessling said:
WOW !!!!
Did you try it on 1xCR123 primary cells?
I like that !!!
bernie

Hi Bernie,
I did and the U2 wouldn't power up at all.

Visible EM Wave said:
Where can I get a A21? I'm sure it will soon be out of stock because of this thread. :laughing:

I got one directly from Surefire. It was on backorder at first. Took about 2 months to fill.

If you do a search for "A21", you'll find it. No picture though.

I get all light levels on one R123. I tried it for only a few seconds.

greenLED · Nov 10, 2006

This is too cool, grnamin!

cryhavok · Nov 10, 2006

wow super cool! Is the brightness affected any?

grnamin · Nov 10, 2006

Thank you for your kind words. Just a flashoholic here in SF Legoland.

I get 6 light levels on an R123, but for how long, I don't know.

greensilverado · Nov 10, 2006

is the A21 basically a single cell extender??

grnamin · Nov 10, 2006

It's more like an adapter than an extender. If you put an A21 and and A12 together, you'll get an assembly that can hold 2x123 with a U2.

Introducing the Surefire U2-S...

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