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Streamlight

Streamlight 66318 MicroStream 45-Lumen Everyday Carry Pocket Flashlight with AAA Alkaline Battery, Black

  • Based on 12,255 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Mar 8
Order within 5 hours and 33 minutes
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Features

  • Anodized Aluminum
  • Made in the USA or Imported
  • Type II MIL-SPEC abrasion and corrosion-resistant anodized aircraft aluminum construction with unbreakable, scratch-resistant polycarbonate lens
  • Ultra compact design fits in the palm of your hand, comfortably fits in your pocket
  • Type II mil spec abrasion and corrosion resistant anodized aircraft aluminum construction with unbreakable, scratch resistant polycarbonate lens
  • Removable pocket clip also clips onto brim of hat for hands free use

Description

The Microstream is a compact single AAA alkaline battery powered flashlight designed for use in all markets. It features a tail cap switch, momentary or constant on operation, a combination pocket/hat clip for convenience, and amazing brightness and run time for a light of its size and price. The aluminum housing with Type II Military Spec anodizing helps make the light extremely durable and abrasion resistant. Compact and lightweight, the Streamlight MicroStream is a portable penlight with a super- bright, high-flux LED that lasts up to 30,000 hours. Featuring a tail-cap switch for single-handed operation, and durable and water-resistant materials for use in extreme conditions, the Streamlight MicroStream Penlight is ideal for daily use at home or at work.Powerful Performance in a Petite Package Weighing just 1.04 ounces, the Streamlight MicroStream Penlight is small enough to fit easily and comfortably in your pocket, purse, backpack, or tool bag. You can also clip it to your pocket for easy access, or use the included key ring or safety lanyard for convenient portability. Powered by one "AAA" battery (included), the MicroStream produces 20 lumens of light with a battery run time of 1-1/2 hours, and the 1/2-watt LED will last 30,000 hours.The Advantages of LED Light An LED is ideal for a light that gets used on a daily basis. You don't have to worry about breaking the light, since there is no glass or filament, and you rarely have to replace LEDs because they can last a lifetime. Save time and money on batteries as well--they will last much longer with an LED than with a regular light bulb.Innovative Technology Provides Bright, Powerful Illumination With Streamlight's specially engineered reflector, proprietary Micro Optical System (MOS) for optimized output and run time, and battery-booster electronics, the MicroStream produces a bright and powerful beam of light that is more intense than most LEDs on the market.Push Button for Convenient Operation Designed to keep out dust and other particles, the rubber, push-button tail cap is quick and easy to use with one hand. Depress the tail cap slightly for a momentary light, or click into the constant-on position. With a comfortable, tactile feel, the convenient push button is also stiff enough that it won't accidentally turn on in your handbag or pocket.Durably Constructed for Use in Extreme Conditions Machined from solid, aircraft-grade aluminum, the MicroStream is corrosion and water resistant, and features an unbreakable and scratch-resistant polycarbonate lens. Arriving with an unbreakable pocket clip, the MicroStream is ideal for use in automotive, hardware, law enforcement, security, sporting, and outdoor applications. It's been extensively field tested and drop-test verified above the industry standard of 6 feet. The Streamlight MicroStream Penlight is backed by a manufacturer's limited lifetime warranty.What's in the Box Streamlight MicroStream Penlight, key ring, safety lanyard, and one "AAA" battery. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer Streamlight Micro Stream LED Pen Flashlight features a super bright, high flux, 1/2 watt LED and has a lifetime of up to 30,000 hours as well as never needs to be replaced. It consists of micro optical system which facilitates optimized output and run time. This flashlight is corrosion and has waterproof construction with an unbreakable polycarbonate lens as well as pocket clip. It consists of rubber push button tail cap on-off switching. See more

Special Feature: Non-Rechargeable, Water Resistant


Color: Black


Power Source: Battery Powered


Light Source Type: LED


Material: Aluminum


Special Feature: ‎Non-Rechargeable, Water Resistant


Color: ‎Black


Power Source: ‎Battery Powered


Light Source Type: ‎LED


Material: ‎Aluminum


White Brightness: ‎45 Lumens


Included Components: ‎Battery, Clip, Flashlight, User Guide


Product Dimensions: ‎3.5"D x 0.6"W x 0.6"H


Voltage: ‎1.5 Volts (DC)


Battery Cell Composition: ‎Alkaline


Item Weight: ‎1.04 Ounces


Number of Batteries: ‎1 AAA batteries required. (included)


Water Resistance Level: ‎Water Resistant


Warranty Type: ‎Limited Lifetime Warranty


Brand: ‎Streamlight


Light Output Maximum: ‎45 Lumens


Battery Description: ‎Alkaline


Style: ‎Clear Retail Packaging


Finish Type: ‎Black


Light Source Wattage: ‎0.15 Watts


Specification Met: ‎ANSI, CE, IPX4


Mounting Type: ‎Cap Mount or Pocket Clip


Recommended Uses For Product: ‎Camping, DIY, Home Defense, Industrial, Safety & Security


Global Trade Identification Number: ‎83


Manufacturer: ‎Streamlight


Size: ‎3.6 inches


UPC: ‎080926663183


Battery Life: ‎5 Hours


Part Number: ‎66318


Item Weight: ‎1.04 ounces


Item model number: ‎66318


Batteries: ‎1 AAA batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Finish: ‎Black


Pattern: ‎Solid


Shape: ‎Round


Wattage: ‎18


Item Package Quantity: ‎1


Number Of Pieces: ‎1


Cutting Diameter: ‎0.61 Inches


Special Features: ‎Non-Rechargeable, Water Resistant


Usage: ‎Inside; Amateur, Inside; Professional, Outside; Amateur, Outside; Professional, Professional


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Description Pile: ‎Alkaline


Warranty Description: ‎Limited lifetime warranty.


Assembled Diameter: ‎0.61 Inches


National Stock Number: ‎6230-01-583-9046


Date First Available: October 19, 2006


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Perfect daily carry light
Review Image by Pj Pj
This is the greatest pocket flashlight ever made. I have destroyed 3 of these lights over the past 5ish years of carrying them every day and am incredibly impressed by how robust they are. This is really a difficult thing to destroy, and every one has partially still worked despite my abuse. Reverse clip is perfect for use on a hat, which I always use in place of a headlamp which I find bulky and restrictive, there are no modes to deal with, just a pleasant, useful light level that isn't too bright for up close work in tight aircraft service compartments where I often find this level of light most useful. One AAA battery, easy to carry extras, and a good few hours of output per battery. I own a stinger 2020 and this light, and between work and home I never find myself asking for anything else. These lights really aren't that fancy or crazy like many of the Chinese brands with high output and hella modes, but damnit they just work ... show more
Reviewed in the United States on June 13, 2025 by Pj Pj
    • Great flashlight !!
Great surpresa! It is small and has a potent bright light and several sets to use! Good material! Cheap to recharge!!
Reviewed in the United States on February 11, 2026 by Miss Astor
    • Excellent Little Flashlight
It's bright and the battery lasts plenty long; it's durable, and I don't worry about it's getting damaged. I have a canvas leatherman pouch I keep on my belt; it has loops on either side of the the leatherman tool holder itself. In one loop, I keep a ratcheting extender. In the other loop, I keep this flashlight. I can leave it in the loop and press the button when I need to illuminate things I can point at by moving the holder slightly. This happens fairly frequently as I help my elderly parents up and down the outside stairs and it's helpful to be able to light them up. It is very nice to have access to a bright light source all the time, and this flashlight makes that easy. ... show more
Reviewed in the United States on September 22, 2025 by Nathan Oliver
    • Everything I Need, Nothing I Don't Need
Why is it so hard to find a well-made, compact flashlight that simply turns on and provides a beam of light? Nowdays it seems like they all have multiple modes that you must click through before they behave like a flashlight. I've got some that strobe when I turn them on, then do an S-O-S thing on the next click, and only on the 3rd click can I get it to act like a frikking flashlight! This is NOT something I want to deal with when I hear the cat barfing in the middle of the night! I don't need to S-O-S a rescue plane while walking down the hall at 2-AM! Enter this little gem! The build quality is AWESOME! I have to depress the button with deliberate force which is good for preventing it from turning on by accident. I can also twist the column to disconnect the current. It's super tiny so it fits in any pocket without bulk. It comes with a convenient pocket clip, too. When I click it, all I get is a simple beam of light with a good throw pattern for something so small. Compact. Check! Built like a (tiny) tank. Check! Super simple. Check! I plan to get a few more for various rooms in my house and will give away the ones that strobe. ... show more
Reviewed in the United States on August 14, 2024 by Joy
    • Perfect EDC for Me
It's easy to carry everyday, has enough light for it to do what I want it to do. Works well and is holding up with no problems.
Reviewed in the United States on January 2, 2026 by Amazon Customer
    • Great Light Bad Incorrect Clip
Ok my reason for buying the light was simple. I needed a quick replacement for my failed Inova X1 which I couldn't live without while its being replaced. First the light is smaller then my X1 and a lot brighter to boot as I have the version 2 of the X1 which would run on a single AA for over 10 hours, that was nice. Note the Stream Light Micro Stream is also very nice and as I said a lot brighter but also no where near the runtime but that's fine as it yields a beautiful bright clean beam, on this they did a great job. Burn time is usully a trade off for this brightness, but overall I like the light the build is very good but not great as I am picky, inova in my opin builds a better light top notch CNC machining on the inova lights in this price class so I'm deducting a star for this plus I do not feel the QC is being watched to close and I hope that someone from Stream Light sees my review as what they have done here is not acceptable in my opin, let me explain ... The light comes with a lanyard however you can't really use it as they do not or no longer provide the correct clip, many images on the net including the image on Amazon show that the light has a skeleton clip that allows you to attach a ring and or lanyard to it, but the light you get now, as of me buying it in 2010 has a standard solid clip no holes to attach the included lanyard, now to me in this price class someone is asleep at the wheel. They shouldn't send out this light with the wrong clip and it should be corrected I think I shall send them an e-mail as I want the correct clip I do not like this solid incorrect clip that they seem to be passing off. I hope others contact them so they send us or make the type of clip this should have. Actually as i am also a FL collector it would be quite slick and more useful if it came with a nice stainless skeleton clip to accent the black body of the light. As for the clip scratching the light while changing the battery, just slip a business card in between and it will be fine, yes that is a small design flaw but not a big deal breaker in my opin. Any way I really feel that the clip it is shown with all over the net is the clip we should get with the light, and I wanted others to know this before they buy, and as I said maybe call or shoot the company an email saying we are not happy with this change and or err on there part at all. Please feel free to comment. ... show more
Reviewed in the United States on March 15, 2010 by DC

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