AL-91AA 1xLED 1xAA FLASHLIGHT


AL-91AA 1xLED 1xAA Flashlight, retail $TBA (www.j2ledflashlight.com...)
Manufactured by (Unknown; possibly Nuwai)
Last updated 03-16-07




The AL-91AA 1xLED 1xAA Flashlight is a single AA single LED flashlight. It comes in an almost all-aluminum body, and features a brilliant 5mm white LED behind a convex (magnifying) lens to produce its light.

A single AA cell in the barrel powers a step-up inverter circuit in the head, which in turn powers that white LED. White LEDs need no less than 3.6 volts, so the inverter has to be there.


SIZE



To use this flashlight, use a sharp knife or a pair of household scissors to remove it and its included battery from the plastic heck they come in. Feed the flashlight, and then you'll be ready to rock.

Turn the bezel (head) clockwise (as if tightening it) to turn the flashlight on.
Turn the bezel counterclockwise (as if loosening it) to turn the flashlight off.
Yes, it really is as easy as that.

The flashlight comes with a spring-loaded "lobster claw" type clasp on a swivel attachment. You can use this clasp to affix the flashlight to your keychain if you wish; it can be removed from your keychain too without having to fumble with all of those jangling keys thanks to that spring-loaded gate on it.



Unscrew and remove the tailcap, gently drop it to the ground, look at it all funny, cock your head all wierd, and kick it into the center of the lawn so you can accidentally run over it with the lawnmower later...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the used AA cell out of the barrel and into your hand, and dispose of or recycle it as you see fit.

Insert a new AA cell into the barrel, button-end (+) positive first, and screw the tailcap back on.
Aren't you glad you didn't kick that tailcap into the lawn now?

Current usage measures 143.3mA on my DMM's 400mA setting.



The flashlight appears to be reasonably sturdy, and it is. Ordinary flashlight accidents should not be enough to do it in. I administered that terrible smack test on it (ten whacks against the corner of a concrete stair; five whacks against the side of the tailcap and five whacks against the side of the bezel), and found the expected damage. There is some very minor gouging on the sides of the tailcap and bezel where it was struck. No optical or electrical malfunctions were detected.

There is what I believe to be a Type II black anodized finish to the entire exterior surface. I tried to cut through this finish to bare metal with the blade of a Swiss army knife, and with some difficulty, I was successful.
Would I really try to chop up a brand spanken new flashlight?
You bet your sugar-coated toilet muscle (sweet patootie) I would, if it's in the name of science.

Water-resistance is a big AAA+++.
When I removed the tailcap, relieved the flashlight of its battery, and performed that dreadful suction test, no leakage was detected. So you can use it with confidence in the rain or snow, and water landings will not kill it either. And if the dog gets angry at it for some reason and vents his anger by lifting his leg on it, no problem - just take the garden hose to it or douche it off under the faucet - good as new.

The beam produced by this flashlight is at least reasonably smooth, but you can see the bond wires and the die (light-emitting chip) in the projected beam image. This is not at all objectionable when the flashlight is used normally; it is only noticeable when shining the flashlight directly at white walls or ceilings.

Total light output is stated on the package as 1.8 lumens, however you need a large and expensive test instrument called an integrating sphere to measure light in lumens, and I do not own or have access to an integrating sphere.



Beam photo at ~12".
Measures 154,300mcd on a Meterman LM631 light meter.
This value is so high primarily because of the focused beam.



Same as above, but deliberately overexposed by 2.0 stops to show the outer rings.


Spectrographic plot
Spectrometer plot of the LED in this flashlight.
Ocean Optics USB2000 Spectrometer on loan from WWW.TWO-CUBED.COM.


ProMetric analysis
Beam cross-sectional analysis.
Image made using the ProMetric System by Radiant Imaging.



TEST NOTES:
Test unit was sent by J.J. of J2LEDflashlights on 07-29-05, and was received on 08-06-05.


UPDATE: 00-00-00



PROS:



CONS:



    MANUFACTURER: Unknown; possibly Nuwai
    PRODUCT TYPE: Large keychain flashlight
    LAMP TYPE: 5mm white LED
    No. OF LAMPS: 1
    BEAM TYPE: Medium spot; very dim corona with rings
    SWITCH TYPE: Twist bezel on/off
    BEZEL: Metal; plastic convex lens protects LED
    BATTERY: 1xAA cell
    CURRENT CONSUMPTION: 143.3mA
    WATER RESISTANT: Yes
    SUBMERSIBLE: Yes, to shallow depths ayway
    ACCESSORIES: 1 Duracell AA cell, keychain attachment
    WARRANTY: 90 days

    PRODUCT RATING:

    Star Rating





AL-91AA 1xLED 1xAA Flashlight * www.j2ledflashlight.com...






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