The Hook-Up Blue Light LED Keychain, retail 99* (
Manufactured by (Unknown)
Last updated 03-15-10

The Hook-Up Blue Light LED Keychain (hereinafter, probably just called a "flashlight") is a small, keychain-style blue LED flashlight.

It comes in a predominately metal body, and has both a spring-loaded carabiner-style clasp and a medium split ring -- both of which allow you to affix it to your keychain.

* The price is $1.99 for two units.

 Size of product w/hand to show scale SIZE

To use the flashlight, just give it a squeeze. Keep holding it that way for as long as you need light.

To turn it off, just quit squeezing.

Although this flashlight appears to have been designed as a disposable product, I believe that the batteries can be changed if you're at least somewhat determined.

The unit uses three LR41 button cells, held in a plastic carriage (which also serves as the whole flashlight itself).

Begin by taking a knife or other instrument with a sharp tip (this is why I think it was intended to be disposable -- you should ***NOT*** need a sharp pointed instrument when servicing this {or any other} flashlight!!!), and carefully pry the blue plastic panel off. Set it aside. Tip the "guts" of the flashlight out, and set the metal portion aside as well.

The following photograph shows what you should now see:

Once you have done this, flip the lid of the inner piece open; you should now see this:

And this is where I'll stop for the time being.

This flashlight appears quite durable, but I don't believe it is too water-resistant. When I had it apart to examine it for a possible battery change, I did not see an O-ring between the plastic side panel and the plastic "guts" of the light beneath that. When the LED-end was suctioned on, ***SIGNIFICANT*** leakage was detected. So water, milk, diet Pepsi, coffee, urine, root beer, or other liquids could get inside through the seam that runs all around the outside. So please try not to drop it in creeks, rivers, ponds, lakes, oceansides, docksides, puddles of laboratory rat pee, glasses of milk, slush piles, mud puddles, tubs, root beer floats, toilet bowls, cisterns, sinks, cups of coffee, fishtanks, dog water dishes, old yucky wet mops, wall-mounted porcelain urinators, or other places where water or water-like liquids might be found. A little rain or snow probably wouldn't hurt it though, so you need not be too concerned about using it in moderately bad weather.

If it fell in water and you suspect it got flooded, disassemble it as you would for a battery change, dump out the water if necessary, and set the parts in a warm dry place for a day or so just to be sure it's completely dry inside before you reassemble and use it again.

If it fell into seawater, got thrown into a glass of milk, fell in a root beer float, if some bogus pisson squirted a Massengill brand post-menstrual disposable "doosh" or a Fleet brand disposable enema at it (and hit it with the liquid), or if somebody or something got "pist off" at it and subsequently "pyst" on it, rinse all the parts out with fresh water before setting them out to dry. You don't want your flashlight to smell like seaweed, sour milk, flowers, fresh butts, or piss when you go to use it next. Besides, salt (from seawater, douches, enemas, or uranation), lactic acid (from moo juice), or sugar (from root beer & ice cream) can't be very good for the insides.

This appears to be a fairly well-constructed flashlight, provided you don't just beat the living tweedle out of it.

One of the two flashlights requires extraordinary pressure (est. 35 to 40 pounds!) just to activate it...let's see if I can repair it based on what I've learned about its interior construction to date...BBS...ok that seemed to do the trick...both LED leads are resting very close to the battery terminals; gently re-forming and then repositioning the leads was the key here.

Beam photograph on the test target at 12".
Measures 3,090mcd on a Meterman LM631 (now Amprobe LM631A) light meter.

Spectrographic analysis
Spectrographic analysis of the LED in this flashlight.
USB2000 spectrometer graciously donated by P.L.

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

Test units were purchased on the PulseTV website on 03-02-10, and were received late on the afternoon of 03-09-10.

Product was made in Taiwan.
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

Nice looking case
Blue LED is not that common to find in a flashlight

Designed to be disposable -- POOF!!! There goes a perfectly good LED in the dustbin (garbage can)!!!
Not very water-resistant and ***DEFINITELY NOT*** submersible
Can be difficult to actuate (turn on)

    PRODUCT TYPE: Blue LED keychain flashlight
    LAMP TYPE: 5mm blue LED
    No. OF LAMPS: 1
    BEAM TYPE: Medium spot w/dimmer corona
    SWITCH TYPE: Momentary squeeze case halves on/off
    CASE MATERIAL: Predominately metal
    BEZEL: Metal; LED very slightly recessed into hosel for it
    BATTERY: 3x LR41 button cells
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER-RESISTANT: Very light splatter-resistance at maximum
    ACCESSORIES: Batteries, short chain, medium split ring
    WARRANTY: Unknown/not stated


    Star Rating

The Hook-Up Blue Light LED Keychain *

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