Best Power For A 3W Cree Projection

[Wassernaut]

Can someone help me with advice on the best way to power a DX 3W Cree Projection light (this one: http://www.dealextreme.com/details.dx/sku.4081 ) to obtain maximum power/throw? It has a 3.6V-9.0V input and states it can be powered by 2xcr123A or 1x18650 and has a Cree XR-E P4 LED emitter.

Should I use (for max power throw) -

2xCR123A 3.0V

or

1x18650

or

2xRCR123A 3.6V

or something else?

Thanks - Larry

 

[VidPro]

the most voltage would likly output the highest level, but for the shorter period of time, so the 2 RCRs , for runtime a 18650 would be wonderfull.
RCR123s have very limited capacity.
If it was somehow regulated perfectally, Good quality lithium primaries would give you the most runtime, followed very closely by the 18650.

but you didnt ask about runtime

a single protected 18650 would be the "safest" arrangement and would provide the best rechargability runtime and lifetime of the unit.

but you didnt ask about safe

 

[sysadmn]

I can't add anything to Vidpro's answer, except to note that you can search for "runtime graph" or especially "chevrofreak runtime graphs" to see the effect in action. Both Kaidomain and DX have graphs for some of their lights; the general relationship will be the roughly the same for most lights.

 

[Wassernaut]

Thanks guys. I think I'm going to go with a protected 18650 for safety and the best all around compromise. - Larry