When you initially turn this flashlight on, does this turn on in high output mode or low output mode?

On ALL colors except COYOTE of the Microstream USB Flashlight , the first press results in low output mode, and the second press results in high output mode. On the COYOTE color Microstream USB Flashlight, the first press results in high output mode, and the second press results in low output mode. This topic is covered in the instruction manual for the flashlights.

Is it Intrinsically safe?

Class 1 Div 1, intrinsically safe, lights are marketed as such. That way the company can place a surcharge on the light. Your answer is no

will this light work with a standard battery if needed ?

No 1.5v will work in a pinch you can change the OEM battery out to a TrustFire TR10440 but the onboard usb charger won't charge it.

Can you use a standard alkaline AAA battery in a pinch?

No a standard aaa is only 1.5 volts these use lithium ion cells that are 3.7 volts (4.2 max)

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

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

Product ID: 59844069

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Details

Special Feature
Durable Impact
Color
Black
Power Source
Battery
Light Source Type
LED
Material
Metal

💡250 lumens max brightness

🔋USB rechargeable lithium-ion battery

🔦68m beam distance

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Description

🔦 Light up your hustle with the MicroStream—small size, big impact!

SMART CHARGING - Integrated USB port with metal sleeve protection and charge indicator keeps you powered up and ready.
COMPACT POWERHOUSE - Ultra-compact design packs a punch with 250 lumens brightness—never be left in the dark.
RUGGED RELIABILITY - Military-spec anodized aluminum housing ensures durability and impact resistance for any adventure.
VERSATILE ILLUMINATION - Dual brightness modes (250 lumens high, 50 lumens low) for tailored lighting and extended runtime.
EVERYDAY CARRY ESSENTIAL - Includes removable pocket clip and high-strength lanyard for seamless portability and quick access.

The Streamlight 66604 MicroStream is a sleek, ultra-compact LED flashlight delivering up to 250 lumens with a 68-meter beam. Featuring a rechargeable lithium-ion battery via USB, a durable anodized aluminum body, and dual brightness modes, it’s engineered for professionals and adventurers who demand reliable, portable illumination. Complete with a pocket clip, lanyard, and charge indicator, it’s the perfect everyday carry tool for those who refuse to compromise on performance.

Specifications

Special Feature	Durable, Impact Resistant
Color	Black
Power Source	Battery Powered
Light Source Type	LED
Material	Metal
White Brightness	250 Lumens
Included Components	Battery, Lanyard, Pocket Clip
Product Dimensions	3.87"D x 0.61"W x 0.61"H
Voltage	3 Volts (DC)
Light Path Distance	68 Meters
Battery Cell Composition	Lithium Ion
Item Weight	2.08 ounces
Number of Batteries	1 Lithium Ion batteries required. (included)
Water Resistance Level	Water Resistant
Warranty Type	Limited Lifetime Warranty
Brand	Streamlight
Brightness	1150 Candela
Battery Description	Lithium-Ion
Runtime	1 hour
Style	Box
Finish Type	Black
Specification Met	ANSI, CE, IPX4
Mounting Type	Clip-on Mount
Recommended Uses For Product	Camping, Caving, Cycling, Everyday Carry, Hiking, Medical, Personal Use
Global Trade Identification Number	00080926666047
Manufacturer	Streamlight
Age Range (Description)	Adult
Size	USB Rechargeable
UPC	080926666047
Part Number	66604
Item model number	66604
Batteries	1 Lithium Ion batteries required. (included)
Item Package Quantity	1
Shape	Round
Finish types	Black
Number of Lights	1
Specific Uses	Inside; Amateur, Inside; Professional, Outside; Amateur, Outside; Professional, Professional
Special Features	Durable, Impact Resistant
Shade Color	Black
Shade Material	Metal
Batteries Included?	Yes
Batteries Required?	Yes
Bulb Features	Charge Port Protection, Durable, Multi-Function Switch with Charge Indicator
Average Life	1.5 Hours
Bulb Diameter	0.61 Inches

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Fantastic and great service. Shipping was faster than expected.

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