Prome Red Laser Pen, retail $9.90 (laserpointerstore.com...)
Manufactured by (Unknown)
Last updated 06-27-20
This is a red-emitting diode laser in a fat pen-style body.
It uses a single 18650 Li:ION rechargeable cell for its power source.
It's rated to produce 150mW of laser radiation at 650nm in the red part of the spectrum (these values were measured at 176mW with a wavelength of 664.910nm).
Because this is a laser, you should not shine it into your eyes, other people's eyes, pet's eyes, etc. Just use a little common sense here, k? (It's a bit over spec anyway -- you definitely DO NOT want to use this as a cat toy! )
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To use your shiny new (or CORRODED OLD) Prome Red Laser Pen, just press the button on the barrel and hold it down for as long as you need the laser beam; release it to neutralise the laser.
The laser's focus can be adjusted from infinity (extremely narrow spot even at some distance) to a medium, oblong spot by rotating the bezel (head).
To change the battery in this laser, unscrew & remove the tailcap, and set it aside. If for whatever reason you can't unscrew the tailcap, the laser can be unscrewed about 2/3 of the way down the body (when the "business-end" is aimed skyward
-).
Tip the used 18650 cell out of the barrel and into your hand, and recharge it.
Insert a freshly-charged 18650 cell into the barrel, button-end (+) positive first. This is the opposite of how batteries are installed in most other laser pointers & pen-style portable lasers, so please pay attention to polarity here.
Screw the tailcap (or the bottom 1/3 of the laser) back on, and be done with it.
Current consumption measures 250mA on my DMM.
This is a pen-style portable laser, not a flashlight meant to be thrashed, trashed, bashed, and abused. So I won't try to drown it in the toliet tank, viciously bang it against a steel rod or against a concrete sidewalk in effort to try and expose the bare Metalmarineangemon - er - the bare Metaltrailmon - um that's not it either...the bare Metalsusanoomon...er...uh...wait a sec here...THE BARE METAL (guess I've been watching too much Digimon again! - now I'm just making {vulgar term for feces} up!!!), let my mother's big dog's ghost, her kitty, my kitties or my sister's kitty cats piddle (uranate) on it, hose it down with my mother's gun, run over it with a 450lb Quickie Pulse 6 motorised wheelchair, stomp on it, use a medium sledgehammer in order to bash it open to check it for candiosity, fire it from the cannoñata, drop it down the top of Mt. Erupto (now I guess I've been watching the TV program "Viva Piñata" too much again - candiosity is usually checked with a laser-type device on a platform with a large readout (located at Piñata Central {aka. "Party Central"}), with a handheld wand that Langston Lickatoad uses, or with a pack-of-cards-sized device that Fergy Fudgehog uses; the cannoñata (also located at Piñata Central) is only used to shoot piñatas to piñata parties away from picturesque Piñata Island, and Mt. Erupto is an active volcano on Piñata Island), send it to the Daystrom Institute for additional analyses, or perform other indecencies on it that a flashlight might have to have performed on it. Therefore, this section of the Prome Red Laser Pen's web page will seem a bit more bare than this section of the web page on a page about a flashlight.
Lasers are meant to be loved, not punished.
The Prome Red Laser Pen is sprinkle-resistant at very minimum. So you need not worry about carrying and using the laser in LIGHT rain or snow -- but if you really do get mud or bird shit in the output aperture, you may indeed be SOL.
Below, you'll find my power output and spectrographic findings.
Beam terminus photograph on a wall at ~12".
Beam image bloomed CONSIDERABLY here; the beam is quite compact & clean in reality.
A beam cross-sectional analysis would normally appear here, but my poor defenseless helpless innocent Prometric 8 Beam Cross-Sectional Analyser that I use for that test was destroyed by an almost-direct lightning strike in mid-July 2013.
Brief video on YourTube showing this laser igniting a wooden, "strike on box" match.
TEST NOTES:
Test unit was purchased on Ebay on 01-09-19, and was received on 01-24-19.
UPDATE: 00-00-00
PROS:
Decent beam quality
Properly labelled for wavelength & power output
Battery it uses is rechargeable -- no disposables to worry about
Keyed interlock switch -- a feature not often seen with portable lasers
NEUTRAL:
Collimating lens assembly has a slight "loose" feel to it
CONS:
Unit as a whole has a very slightly "chintzy" or cheap feel to it
MANUFACTURER: Unknown
PRODUCT TYPE: Fat "pen"-style portable laser
LAMP TYPE: Directly-injected red-emitting laser diode
No. OF LAMPS: 1
BEAM TYPE: Adjustable from very narrow spot to medium oblong spot
REFLECTOR TYPE: N/A
SWITCH TYPE: Momentary pushbutton on/off on barrel
CASE MATERIAL: Metal
BEZEL: Metal; laser diode, collimating lens recessed into deep hosel for them
BATTERY: 1x 18650 Li:ION rechargeable cell
CURRENT CONSUMPTION: 250mA
WATER- AND BIRD POOP-RESISTANT: Sprinkle-resistant at maximum
SUBMERSIBLE: No
ACCESSORIES: 2x tailcap interlock keys
SIZE: 222mm L x 11.20mm Dia.
WEIGHT: 83g (2.93 oz.) empty -- 128g (4.55 oz.) incl. battery
COUNTRY OF MANUFACTURE: Unknown; but presumably China
WARRANTY: Unknown/not stated
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)
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- now I'm just making {vulgar term for feces} up!!!), let my mother's big dog's ghost, her kitty, my kitties or my sister's kitty cats piddle (uranate) on it, hose it down with my mother's gun, run over it with a 450lb Quickie Pulse 6 motorised wheelchair, stomp on it, use a medium sledgehammer in order to bash it open to check it for candiosity, fire it from the cannoñata, drop it down the top of Mt. Erupto (now I guess I've been watching the TV program "Viva Piñata" too much again 
