River Rock 2xAA 3W LED Flashlight, retail $~24.00 (www.target.com)
Manufactured by (Unknown) for River Rock
Last updated 08-15-07

This is the River Rock 2 AA cell 3 watt LED flashlight. It uses what I believe is a white Luxeon III LED, and has a mirror-smooth reflector protected by a concave window.

It comes in a mostly aluminum body, feeds its LED from two AA cells, and has a "tactical" tailcap - push for momentary, twist for continuous.

The flashlight is finished in a camouflage (or "camo" for short); however since this is a loaner, I don't know what type of finish it has - paint or anodizing.

Because it uses just two cells, there is a DC-DC inverter somewhere inside to boost the voltage from the ~+3 volts produced by the batteries to the +3.6 to +4.0 volts needed by that white LED. I attempted to use an oscilloscope to "see" the inverter, and could see the rapid waves indicative of such an inverter.


Press the rubberised button on the tailcap and hold it for as long as you need light. Release it to douse (extinguish) the light. This is momentary or signalling mode.

Twist the tailcap clockwise to turn the flashlight on in continuous (hands-free) mode.
Twist the tailcap counterclockwise to turn the flashlight back off.

The flashlight comes with a wrist strap, already affixed to the unit's tailcap by wrapping around a small plastic ring on the barrel where the tailcap screws on; it can be removed by unscrewing & removing the tailcap and then lifting it away - if you can get it past the O-ring that is.
This strap is large enough to go around the flashlight, so you can use this strap to hang the flashlight from thin tree branches, thin water pipes, or other long thin objects with no readily accessible "end".

To change the batteries, unscrew and remove the tailcap, gently place it on the ground, and kick it into the garden so the hungry, hungry praying mantids will think it's something yummy for their insect tummies and subsequently strike at it...O WAIT!!! YOU'LL NEED THAT!!! So just set it aside instead.

Tip the used-up old AA cells out of the barrel and into your hand, and dispose of or recycle them as you see fit.

Slide two new AA cells in the flashlight barrel, orienting them so their button-ends (+) positives go in first. Finally, screw the tailcap back on; and unscrew it slightly when your flashlight springs to life.
Aren't you glad you didn't kick that tailcap into the garden with all those hungry, hungry praying mantids now?

Here is what a praying mantis looks like.
I found this guy on the morning of 09-08-06 clinging to the basket of my scooter.

Current usage measures 257.4mA on my DMM's 400mA scale.

This is a loaner. So I won't throw it against the wall, stomp on it, try to drown it in the toilet bowl or the cistern, run over it, swing it against the concrete floor of a patio, bash it open to check it for candiosity, fire it from the cannonada (I guess I've been watching the TV program "Viva Piņata" too much again - candiosity is usually checked with a laser-type device on a platform with a large display or with a handheld wand), send it to the Daystrom Institute for additional analysis, or inflict upon it punishments that flashlights may have inflicted upon them.
So this section of the flashlight's web page will seem a bit more bare than this section of the web page on a page about a flashlight that is not a loaner sample.

I performed that dreadful suction test on it, and the barrel held a good partial vacuum - but the tailcap itself had a significant leak in it, so it is weather-resistant at best, but is not submersible.

Beam photograph on the test target at 12".
Measures 1,286,000mcd on a Meterman LM631 light meter.

Photograph of the beam on a wall at ~10'.

Those rectangular graphic things in the upper left quadrant of this photograph are marquees from:
Nintendo ''R-Type''
Super Tiger...er...uh...Konami ''Super Cobra''
Midway ''Omega Race''
Sega ''Star Trek''
Williams ''Joust''
Venture Line ''Looping''
Universal ''Mr. Do!'s Castle''
Jaleco ''Exerion''
Gremlin/Sega ''Astro Blaster''
Atari ''Tempest''
Gottlieb ''Q*bert''

upright coin-op arcade video games from the 1980s.

That graphic toward the right is:
A "BIG SCARY LASER" poster sent by www.megagreen.co.uk

And that clock to the right of the sign is an Infinity Optics Clock.

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 unit of this and four other products were loaned to me by a website fan on 08-12-07,
and were received on the afternoon of 08-14-07.

Product was made in China. A product's country of origin really does matter to some people, which is why I published it on this web page.

UPDATE: 00-00-00



    PRODUCT TYPE: Medium handheld flashlight
    LAMP TYPE: White 3W Luxeon LED
    No. OF LAMPS: 1
    BEAM TYPE: Medium spot w/soft corona
    SWITCH TYPE: Push tailcap momentary, twist tailcap continuous on/off
    CASE MATERIAL: Aluminum
    BEZEL: Metal; LED & reflector protected by plastic concave window
    BATTERY: 2xAA cells
    WATER RESISTANT: Yes, weather-resistant at maximum
    ACCESSORIES: 2xAA cells, wrist lanyard
    SIZE: 5.6" L, 1.1" D
    WEIGHT: 4.8 oz (with batteries)
    WARRANTY: Unknown/not stated


    Star Rating

River Rock 2xAA 3W LED Flashlight *

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