KX1a (mini scout head) 2x CR123A's?

Can the Surefire KX1a LED head be driven by 2x CR123A batteries, if I put it on and E2D body for instance?

I figured this would be the best place to ask, if not let me know. Thanks!

According to the specs, KX1A supports 3V, so you won't be able to.

enomosiki said:

According to the specs, KX1A supports 3V, so you won't be able to.

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Where did you find the specs at?

If you had a body that you wanted to use the head on, you could use a dummy cell plus one battery...

KX1A can handle 1XCR123, and 2X NiMh AA's, 2X NiCd AA's, as well as 2X Alkaline AA cells. It can probably handle 1X LiFePO4 (3.2 V RCR123), though not sure.

Bill

fresh eddie fresh said:

If you had a body that you wanted to use the head on, you could use a dummy cell plus one battery...

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Where would I find a dummy cell?

Bullzeyebill said:

KX1A can handle 1XCR123, and 2X NiMh AA's, 2X NiCd AA's, as well as 2X Alkaline AA cells. It can probably handle 1X LiFePO4 (3.2 V RCR123), though not sure.

Bill

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What is likely to happen if I try to drive it with 2xCR123's? Will I kill it?

noahfn said:

What is likely to happen if I try to drive it with 2xCR123's? Will I kill it?

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Yes, the KX1A uses a boost circuit, and with two CR123's it will be overdriven, causing damage to the LED and circuit. Use a KX2 series SF to run two CR123's, as it uses a buck circuit, reducing the current to the LED so the LED can see the correct vf to run it in spec. My KX2 will run in regulation with three CR123's, or two Li-Ion cells.

Bill

noahfn said:

Where would I find a dummy cell?

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noahfn said:

What is likely to happen if I try to drive it with 2xCR123's? Will I kill it?

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Lots of places sell "dummy" cells ... LightHound, Oveready, AW, etc.

IIRC, KX1A has boost-only (no buck), so LED would see about 6v ... probably the LED fairly quick, would be my guess ?

EDIT - Bill typed faster than I