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Streamlight

Streamlight 66210 MegaStream Rechargeable Tactical Flashlight

Streamlight 66210 MegaStream Rechargeable Tactical Flashlight

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The Streamlight MegaStream delivers exceptional brightness and beam intensity in a compact handheld design engineered for everyday carry and demanding tactical tasks. Generating up to 1,800 lumens and 26,000 candelas, it produces a focused beam reaching up to 322 meters to illuminate broad work areas and distant objects with ease.

Constructed with durable machined aluminum and an anodized finish, this flashlight features IPX7-rated water resistance and impact resistance for dependable use in harsh environments. The versatile multi-mode system allows swift adjustments across lighting levels, making it ideal for outdoor recreation, emergency preparedness, and professional security applications.

Key Features

Brand Streamlight
Model Number 66210
Light Source Type LED
Maximum Brightness 1800 lumens
Beam Distance 322 meters
Power Source Battery Powered
Battery Type Lithium Ion (SL-B34)
Voltage 3.6 V
Material Machined Aluminum
Water Resistance Level IPX7
Product Dimensions 5.3 in L x 1.1 in W x 1.1 in H
Product Weight 5.44 oz

Highlights

  • HIGH-OUTPUT PERFORMANCE: Produces up to 1,800 lumens and 26,000 candelas for powerful illumination and long-range visibility during inspections, outdoor activities, and emergency situations
  • COMPACT HIGH-CANDELA FLASHLIGHT: Delivers exceptional brightness and beam intensity in a handheld design that fits comfortably in pockets, packs, and gear bags
  • EVERYDAY CARRY & OUTDOOR VERSATILITY: Ideal for property checks, camping, hiking, inspections, emergency preparedness, and daily carry applications where dependable illumination is essential
  • WHAT’S IN THE BOX: Includes MegaStream USB flashlight, charging cable, holster, and standard accessories
  • BUILT STREAMLIGHT TOUGH: Machined aluminum construction with a durable anodized finish, water-resistant performance, and impact resistance for dependable use in demanding environments

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Materials & care

Wipe the machined aluminum body with a soft, damp cloth as needed. Keep the USB charging port clean and ensure threads remain free of debris to maintain water resistance.

Compatibility

Compatible exclusively with Streamlight SL-B34 rechargeable lithium-ion battery packs.

How to use

To activate High mode, tap and hold the tail switch, then click to lock on. For Medium mode, quickly double-tap within 0.4 seconds and click to lock. For Low mode, triple-tap within 0.4 seconds per tap and click to lock.

Warranty

Limited lifetime warranty.

What's included

  • MegaStream USB flashlight
  • Charging cable
  • Holster
  • Standard accessories

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Frequently asked questions

How long does it take to charge the MegaStream flashlight?

The battery fully recharges in about five hours.

How do you recharge the battery?

Turn the light off and slide the head cover toward the tail switch to reveal the USB-C charge port, then plug in the included cable. The battery can also be charged outside the flashlight.

How is battery charging status indicated?

A red LED illuminates while the battery is charging, which switches to green once fully charged.

What type of battery does this flashlight use?

The MegaStream accepts only the Streamlight SL-B34 battery pack.

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