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Streamlight

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

  • Based on 12,219 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Nov 7
Order within 20 hours and 14 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.

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


Brightness: ‎420 Candela


Battery Description: ‎Alkaline


Style: ‎Clear Retail Packaging


Finish Type: ‎Black


Light Source Wattage: ‎0.15 Watts


Specification Met: ‎ANSI, CE, IPX4


Mounting Type: ‎Clip-on Mount


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


Global Trade Identification Number: ‎83


Manufacturer: ‎Streamlight


Size: ‎3.6 inches


UPC: ‎080926663183


Light Output Maximum: ‎45 Lumens


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: Friday, Nov 7

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.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • 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
    • Great little light!
This is an awesome little flashlight! It's well made, bright enough for most any task in the dark and very sturdy!! I accidentally left it in my pants and it went thru the washing machine, and it has worked just fine ever since!! The button is a little hard to press, but I like that so it won't accidentally turn on in my pocket. It's just a great little light that is not overpriced!! ... show more
Reviewed in the United States on October 17, 2025 by Art.
    • 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
    • The BEST flashlight I have ever used
This little guy is the most important tool I have with me at all times. I am a part time delivery driver for a private company, working anywhere from noon to 2am. It became natural for me to look towards a light that would fulfill the demands of the job. My criteria for a flashlight were as follows: -Price -Function -Size -Battery compatibility Price - I'm a college student, $20 for a flashlight is very reasonable. You get over 40 lumens of brightness and it's made from a well known company. Function - I need a flashlight that is easily deployable, carryable and usable. There is a momentary on switch which comes in handy when I need to illuminate house numbers or a path for only a few seconds. Also, the biggest selling point of the flashlight would be its simple on off function. Many companies are moving towards the versatility of having a low, med, and high beam and sometimes an SOS or strobe function on. All of that is unnecessary in my opinion and makes it harder for you to use it when you need it. You can do strobe and SOS by yourself if needed. Medium function is useless and low is only helpful when it is 2-3 lumens (say, if I'm in my car and need to look at a map). This flashlight is either on or it's off. Simple and clean. It's also waterproof. I am confident that if I were to drop it in a lake or put it in the washing machine, as many other reviewers have done, it will reliably turn on with the first click of the button. Size - Easily the smallest usable flashlight on the market. You can look at some other reviews and pictures if you want an idea of how small it is. It's about the size of a chapstick container or a pen. Fits great in my back pocket and is always there when I need it. Battery - Many of the similar priced flashlights on the market use a 18650 rechargable battery or a couple CR123A batteries. Good luck trying to find a CR123A battery or 18650 charger at a non specialty store; this Streamlight flashlight as well as the stylus pro uses AAA batteres. Way more plentiful and easy to replace since they have them everywhere. All products have their downsides. Here are some things that I've noticed through my time using Streamlight flashlights: -Clip is easy to break. It catches on my coat and seat whenever I climb in and out. It bent itself open and no longer fits in my pocket securely (mostly my fault though). -It will rip holes in your jeans. the bezel of the flashlight tip is actually pretty sharp and so far has ruined two of my pockets. If you carry this flashlight keep it in a cloth sheath or put it in a pocket where it is not stretching your jeans. Would highly recommend this or the Stylus Pro. It will fulfill your duties if all you need is something that is brighter than your phone flashlight. ... show more
Reviewed in the United States on February 12, 2017 by Justin
    • Compact, Bright, and Always Reliable
I've used a lot of small flashlights over the years, but the Streamlight MicroStream really impressed me. Despite its compact size, it puts out a surprisingly bright 45 lumens, which is more than enough for most tasks. Whether I’m out on a night hike, working under the hood, or just looking for something in the garage, this little light does the trick. The clip is sturdy and versatile—I’ve attached it to my pocket, hat brim, and even my tool bag. The push-button tail switch is responsive, and I appreciate the momentary or constant-on feature. The aluminum housing makes it tough enough to handle drops and rough use without any issues. Battery life is decent for its size, and I like that it runs on a single AAA battery. Simple, effective, and rugged—exactly what I want in a pocket flashlight. Highly recommend it for anyone looking for a reliable everyday carry light. ... show more
Reviewed in the United States on May 13, 2025 by James Williams

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