STREAMLIGHT Megastream USB Flashlight

FAQs
- Q: What should I do if the flashlight does not turn on?
- A: Check the battery level and ensure it is fully charged. If the issue persists, contact customer support for assistance.
- Q: Can I use aftermarket batteries with this flashlight?
- A: It is recommended to use genuine Streamlight replacement parts to maintain product safety and warranty validity.
PRODUCT INFORMATION
IMPORTANT: FULLY CHARGE SL-B34® BATTERY PACK BEFORE FIRST USE.
Thank you for selecting the MegaStream® USB flashlight. As with any fine tool, reasonable care and maintenance of this product will provide years of dependable service. Please read this manual before using your MegaStream® USB. SAVE THESE INSTRUCTIONS. This guide contains important safety and operating instructions for your MegaStream® USB.
SAFETY INFORMATION
LED SAFETY
LED RADIATION (RG-2). DO NOT STARE INTO BEAM. MAY BE HARMFUL TO THE EYES. PER IEC 62471 Ed 1.0:2006-07.
WARNING RISK OF INJURY. THE USE OF SUBSTANDARD OR AFTERMARKET COMPONENTS, MODIFICATIONS TO THE ORIGINAL PARTS, OR USE OF THIS FLASHLIGHT WITH ANY INCOMPATIBLE PRODUCT MAY VOID THE WARRANTY AND COULD LEAD TO PRODUCT FAILURE OR PERSONAL INJURY.
BATTERY SAFETY
EXPLOSION RISK, BURN, AND FIRE HAZARD. DO NOT DISASSEMBLE, CRUSH, SHORT CIRCUIT, HEAT ABOVE 140°F (60°C), OR DISCARD IN FIRE. USE AND CHARGE ONLY WITH THE SPECIFIED STREAMLIGHT PRODUCTS. KEEP AWAY FROM CHILDREN. BATTERY MUST BE RECYCLED OR DISPOSED OF PROPERLY.
The Streamlight SL-B34® battery contained in this product is recyclable. At the end of its useful life, under various country and state laws, it may be illegal to dispose of this battery in the municipal solid waste stream. Check with your local solid waste officials for details in your area for recycling options or proper disposal (In USA: RBRC).
USB CHARGING
Fully charge the SL-B34® battery before first use.
To charge the battery, turn the light off and slide the head cover towards the tail switch to expose the USB-C connector and charge indicator LED of the SL-B34® battery. Using the supplied cord, plug the USB-C connector into the mating socket on the SL-B34® battery. The battery may be left plugged into a USB-C cable continuously, there is no danger of overcharging. The battery fully recharges in 5 hours. When not charging, close the head cover completely to protect the USB-C charging port from debris and water infiltration.
LED Charge Indicators
- Charging… Red LED is on.
- Charged…Green LED is on.
BATTERY INSTALLATION/REMOVAL
Use only the Streamlight SL-B34® Li-ion rechargeable battery. Unscrew the tail cap and remove the depleted battery, insert fresh battery positive end first, and replace and tighten the tail cap. Slide the head cover towards to tail switch to ensure the USB-C port can be seen in the opening. The battery may also be charged outside of the light.
GENERAL OPERATION
The MegaStream® USB features a tail switch with momentary operation (light press or tap) and constant on operation (press until click).
- High: Tap and hold; click to lock on; click again for off.
- Low: Fast double-tap (within 0.4 seconds) and hold; click to lock on; click again for off.
When the battery is almost depleted the light output will drop off dramatically. There is no end-of-run time notification, the light will simply turn off.
PRODUCT USE
Streamlight flashlights are intended for use as high-intensity, heavy-duty, and portable light sources. The use of Streamlight flashlights for any purpose other than as light sources is specifically discouraged by the manufacturer. Streamlight specifically disclaims liability for other than recommended use.
NOTICE Be sure to use only genuine Streamlight replacement parts to ensure product safety. Substitution may invalidate the product approval. Do not try to repair the unit yourself. Send to a qualified service facility or return it to the factory.
WARRANTY
Streamlight Limited Lifetime Warranty
Streamlight warrants this product to be free of defects for a lifetime of use except for batteries and bulbs, abuse, and normal wear. We will repair, replace, or refund the purchase price of this product should we determine it to be defective. This limited lifetime warranty also excludes rechargeable batteries, chargers, switches, and electronics which have a 2-year warranty with proof of purchase. THIS IS THE ONLY WARRANTY, EXPRESSED OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. INCIDENT-TAL, CONSEQUENTIAL, OR SPECIAL DAMAGES ARE EXPRESSLY DISCLAIMED EXCEPT WHERE SUCH LIMITATION IS PROHIBITED BY LAW. You may have other specific legal rights which vary by jurisdiction.
Go to streamlight.com/support for a complete copy of the warranty. To register your product, go to streamlight.com (Online Product Registration). Retain your receipt or any proof of purchase.
SERVICE OPTIONS
The MegaStream® USB contains few or no user-service- able parts. For service options, go to streamlight.com/support/service and complete the Online Service Request for factory service or to find the location of an authorized Streamlight repair center near you.
- IMPORTANT: FULLY CHARGE SL-B34® BATTERY PACK BEFORE FIRST USE.
- Caution: Optical Radiation (RG-2). Do not stare into the beam. May be harmful to the eyes. Per IEC 62471:2006
- IMPORTANTE: CARGUE EL PAQUETE DE PILAS SL-B34® COMPLETAMENTE ANTES DE USARLA POR PRIMERA VEZ.
CONTACT INFORMATION
Or contact:
- Customer Service © Streamlight, Inc.
- 30 Eagleville Road
- Suite 100
- Eagleville, PA 19403-3996, USA
- Phone: (800) 523-7488 Toll-Free / +1 (610) 631-0600
- Fax: (800) 220-7007 / +1 (610) 631-0712
- Email: cs@streamlight.com
Documents / Resources
![]() | Megastream USB Flashlight |
References
- Streamlight Tactical & Safety Rated Flashlights & Headlampsstreamlight.com
- Supportstreamlight.com
- Service Optionsstreamlight.com
- User Manualmanual.tools

