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Streamlight

Streamlight 66604 MicroStream USB 250-Lumen 1150-Candela EDC Ultra-Compact Flashlight with Rechargeable Battery, Easy-Open Box, Black

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Style: Easy-Open Box


Size: USB Rechargeable (Pack of 1)


Color: Black


Features

  • Everyday Carry Designed: Designed to be your EDC light for practicality and preparedness, the MicroStream is ultra compact and is less than 4 Inches in length
  • Powerful and Portable: Features 250 Lumens, 1150 Candelas, beam distance of 68 Meters with a run time of 1.5 Hours on high; On low mode, 50 Lumens, beam distance of 31 Meters with a run time of 3.5 Hours
  • USB Rechargeable: No need to buy batteries, recharges via supplied USB micro-USB cable ; Includes a charge indicator and fully recharges in less than 4 Hours
  • Hands-Free Operation: The Streamlight MicroStream comes with a removable pocket clip that allows you to clip it on a brim of a hat for hands free use
  • Built Streamlight Tough: Durable aluminum construction, IPX4 water resistant and 1 Meter impact resistance tested

Description

The Streamlight MicroStream USB Rechargeable LED flashlight is a high- performance everyday carry light built for reliability and convenience. Delivering up to 500 Lumens on high, it features two brightness modes for versatile use, from close-up tasks to long-range illumination. Compact in size yet powerful, the MicroStream USB is powered by a rechargeable battery that conveniently charges via a micro-USB port with a charge indicator to monitor power status. Its durable anodized aluminum body is impact and abrasion- resistant, while the IPX4 water-resistant rating ensures dependable performance in challenging conditions. A two-way pocket clip allows for flexible carry options; attach it to your pocket, belt, or hat brim for hands- free lighting. Combining portability, ruggedness, and long-lasting power, the Streamlight MicroStream is an ideal companion for technicians, first responders, outdoor enthusiasts, or anyone needing dependable illumination on the go.

Specs & Other Info

SpecificationDetails
Key FeaturesHighly Durable, Shockproof
ColorBlack
Power SourceBattery Operated
Light TypeLED
MaterialMetal
Luminosity250 Lumens
Accessories IncludedLanyard, Clip, Battery
Dimensions3.87"D x 0.61"W x 0.61"H
Voltage3V (DC)
Beam Distance68 Meters
Battery TypeLithium Ion
Weight2.08 oz
Number of Batteries1 Lithium Ion (included)
Water ResistanceWater-resistant
WarrantyLimited Lifetime
BrandStreamlight
Peak Beam Intensity1150 Candela
Runtime1 hour
Charging StyleUSB Rechargeable
ComplianceIPX4, CE, ANSI
Use CasesOutdoor & Indoor Activities including Cycling, Caving, and Camping
Manufactured InChina
Model Number66604

Frequently asked questions

The Streamlight MicroStream 250-Lumen flashlight features a rechargeable battery that, once fully charged, can provide up to 3.5 hours of continuous use on its low setting. On the high setting, the battery life is approximately 1.5 hours.

Yes, the Streamlight MicroStream 250-Lumen flashlight is designed to be waterproof and has an IPX4 rating. This means it is resistant to water splashes from all directions, making it suitable for use in various weather conditions.

Yes, the Streamlight MicroStream 250-Lumen flashlight comes with a USB rechargeable battery and can be charged using most standard USB chargers. The micro USB port allows for convenient charging with common devices like laptop USB ports, car USB ports, or USB wall adapters.

The Streamlight MicroStream 250-Lumen flashlight utilizes a high-powered LED that can deliver a maximum output of 250 lumens. It is engineered for bright, powerful illumination, making it ideal for a range of everyday tasks and situations.

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Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The Streamlight 66601 MicroStream 250-Lumen EDC Ultra-Compact Flashlight earns high praise for its performance, durability, and design. Users emphasize its superior brightness and compact shape, making it an ideal everyday carry flashlight. The USB rechargeable battery offers convenience and environmental benefits, while its sturdy construction withstands rough usage and harsh conditions. Overall, customers are thrilled with its functionality, recommending it for anyone needing a reliable, portable light source.

Pros

  • 🔆 Impressive brightness for its size, offering 250 lumens of light output.
  • 👝 Ultra-compact and lightweight, enhancing portability for everyday carry.
  • 🔋 USB rechargeable battery, reducing waste and operating costs.
  • 💧 Durable, impact-resistant, and waterproof construction for reliability in tough conditions.
  • 🧢 Versatile pocket clip design for easy attachment to clothing or as a makeshift headlamp.

Cons

  • ⏲ Limited information on exact battery life span per charge from reviews.
  • 🔌 May require frequent recharging with heavy use, based on indirect mentions.

Should I Buy It?

Yes, the Streamlight 66601 MicroStream EDC Flashlight is highly recommended for its powerful output, compactness, and durability. It’s an excellent investment for anyone from outdoor enthusiasts to professionals looking for a reliable lighting solution. With its positive reviews focusing on performance and quality, it stands out as a top choice in the EDC flashlight category.

    • Best small flashlight I’ve ever owned.
Style: Clear Retail Packaging Size: USB Rechargeable (Pack of 1) Color: Coyote
Great low-profile flashlight. Pocket real estate is at a premium for me, so the size of these is perfect. I often have to use my mouth to hold flashlights at work so I can use both hands, and this has been the most comfortable flashlight my lips have clasped. I use it everyday and I use it A LOT. I have to keep an extra one of these in my backpack because sometimes the battery runs out before my workday is over, but usually it lasts me all day. Love that it’s rechargeable. I used it for over a year before I noticed it started to die quicker. I just replaced the old battery with a new stream light rechargeable battery, and it was like new again. Still WAY cheaper than a flashlight that just uses standard AA/AAA or CR123 batteries. I work on cars, so I’m never using it for anything more than 6 feet away, but for my purposes, this flashlight has been the gold-standard I measure all small handheld flashlights against. The amount of brightness you get for the size of the flashlight is top tier. The pocket clip snapped and broke on my first one after a couple years, but like I said, I use this all day everyday. I’d still say the durability is great for the price. I had to remove the pocket clip on my new one and squeeze it with some pliers to make it clamp down tighter because it kept falling off my pocket. Since then I haven’t had any issues. Love this little flashlight. I went through about 5 or 6 small flashlights before I found this one. This one is better in every way. As long as the price doesn’t go any higher it’s a 10/10 will buy again when I inevitably lose mine. ... show more
Reviewed in the United States on December 13, 2025 by Ethan Hamilton
    • Reliable and Bright Emergency Flashlight
Style: Clear Retail Packaging Size: USB Rechargeable (Pack of 1) Color: Coyote
Streamlight always delivers top-quality flashlights, and this compact one is no exception. Despite its small size, it emits a surprisingly powerful beam, making it perfect for emergencies. A key selling point is its convenient rechargeable feature, eliminating the need to remove the battery. Plus, the long-lasting Lithium Ion cell ensures extended use. Just be cautious as the LED bulb can generate heat with prolonged use. It's no wonder this is the preferred "penlight" among law enforcement professionals. I absolutely love this flashlight and highly recommend it for anyone in need of a reliable light source! ... show more
Reviewed in the United States on June 20, 2025 by Dewlon
    • High quality Admin / Task Light
Style: Easy-Open Box Size: USB Rechargeable (Pack of 1) Color: Black
Review Image by B_Bayous B_Bayous
Great mini task light. Easy to use. One button push for low. Two for high. Click for constant on. Light output is good for its size. Enough to be usable. Good Hotspot / focus for a mini light. Rechargeable batteries is a huge plus. Power / battery life is good. Small form factor. Easy to carry in a bag or pocket. Takes up little space. ... show more
Reviewed in the United States on November 25, 2025 by B_Bayous B_Bayous
    • Fantastic small rechargable penlight.
Style: Clear Retail Packaging Size: USB Rechargeable (Pack of 1) Color: Coyote
Excellent penlight, its small, lightweight, very durable its been dropped through engine bays countless times, its resistant to quick drops in automotive fluids and water, the o ring seal that protects the charging port works great. Ive used Streamlight Stylus penlights for a long time and this one is just as durable, more than twice as bright, is smaller, and costs significantly less to run. The money I save not buying batteries has paid for this flashlight a dozen times over in the few years I have used it. The pocket clip is fantastic the double bend in it allows it to slip into your pocket easily and allows you to clip it to the bill of a hat as a headlamp, the clip holds the light securely in your pocket and doesn't easily pop off the body of the flashlight, that is an annoying and very common problem with other lights I own which is why I glue them in place. (glued this one too) The rechargeable battery gives +50% brightness for 2-3 days for how much I use it which is short periods that are usually 30 seconds to a few minutes at a time at least a dozen times throughout the day. The battery life is comparable to the life I was getting out of 2 lithium AAA batteries in larger/longer flashlights like the Stylus the only difference is when I notice its running down I just leave it on to drain the battery so I can recharge it instead of limping along with a light that is too dim for a day or two to not waste money, most importantly I don't worry about using it "too much" since I am not paying for expensive lithium batteries. From completely dead to fully charged takes about an 1.5-2 hours (never timed it but that's a good estimate) but if the battery is dead and you just want to use it 15-20 minutes on the charger gets you plenty of brightness and usable run time. In summary this is a fantastic, small, lightweight, fairly bright, durable rechargeable penlight that performs better than the comparable AAA 2 battery lights I have owned from every major brand. Buy one you will not regret it. ... show more
Reviewed in the United States on May 27, 2023 by Tom Sawyer

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