Streamlight 90541
Streamlight Survivor LED Flashlight User Manual
Model: ST90541
Introduction
The Streamlight Survivor LED Flashlight is a high-performance, durable lighting tool designed for various demanding environments. Its robust construction and advanced LED technology provide reliable illumination. This manual provides essential information for the proper setup, operation, maintenance, and troubleshooting of your Survivor LED flashlight.

Figure 1: Front view of the Streamlight Survivor LED Flashlight, showcasing its yellow body and angled head.
Safety Information
Always read and understand all instructions and warnings before using this product. Failure to do so can result in electric shock, fire, or serious injury.
- Do not look directly into the LED light. This can cause temporary blindness or permanent eye damage.
- Use only the specified battery type. Incorrect battery usage can lead to explosion, leakage, or fire.
- Keep out of reach of children.
- Do not attempt to repair the unit yourself. Refer all servicing to qualified personnel.
- Ensure the battery compartment is sealed properly to maintain water resistance.

Figure 2: HAZ-LO Division 1 Lighting certification logo, indicating suitability for hazardous environments.
Setup
Battery Installation
The Streamlight Survivor LED Flashlight operates on 4 AA alkaline batteries. Ensure batteries are inserted with correct polarity.
- Unscrew the battery compartment cap located at the bottom of the flashlight.
- Insert four (4) AA batteries, observing the polarity markings (+/-) inside the compartment.
- Carefully replace the battery compartment cap, ensuring it is fully tightened to maintain the flashlight's water resistance.
Initial Inspection
Before first use, inspect the flashlight for any visible damage. Check that the lens is clean and free of scratches, and that all seals are intact.
Operating Instructions
Power On/Off and Mode Selection
The flashlight features a single button for operation, located on the top of the unit.
- To turn on: Press the power button once. The flashlight will activate in its high-intensity mode.
- To cycle modes: Press the power button repeatedly to cycle through available modes: High, Low, and Strobe.
- To turn off: Press and hold the power button for approximately 1 second.
Beam Patterns
The Streamlight Survivor LED is designed to provide a focused beam for optimal distance illumination.

Figure 3: Illustration of different beam patterns: Tradition (general purpose), High Lumen (HL) for wide area illumination, and High Performance High Lumen (HPL) for long-distance focus.
Attachment and Portability
The flashlight includes a robust clip and a D-ring for secure attachment to gear or clothing, allowing for hands-free operation.

Figure 4: The Streamlight Survivor LED Flashlight securely attached to a piece of personal protective equipment, demonstrating its hands-free utility.
Maintenance
Cleaning
Clean the flashlight exterior with a damp cloth. Do not use abrasive cleaners or solvents. Keep the lens clean for optimal light output.
Battery Replacement
Replace batteries when the light output diminishes significantly. Always replace all four batteries at the same time with new, fresh batteries of the same type.
Storage
For long-term storage, remove the batteries to prevent leakage and corrosion. Store the flashlight in a cool, dry place away from direct sunlight.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Dead or incorrectly inserted batteries. | Replace batteries, ensuring correct polarity. |
| Light output is dim. | Low battery power. | Replace batteries. |
| Water inside the battery compartment. | Battery cap not fully tightened or O-ring damaged. | Ensure cap is tight. Inspect and replace O-ring if damaged. Allow compartment to dry completely before reinserting batteries. |
| Light flickers. | Loose battery connection or low battery. | Check battery insertion. Replace batteries. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | ST90541 |
| Color | Yellow |
| Light Source Type | LED (3-watt Luxeon LED) |
| Material | High impact, super tough nylon |
| Lens | Unbreakable Lexan Lens with silicone anti-scratch coating |
| Power Source | Battery Powered (4 AA batteries) |
| Run Time (High) | Up to 3 continuous hours |
| Run Time (Low) | Up to 6 continuous hours |
| Dimensions (H x W x D) | 6-3/4 inches x 2-3/4 inches x 3 inches (approx. 17.15 x 6.99 x 7.62 cm) |
| Weight | Approx. 512.56 g (with batteries) |
| Features | Portable, Shock Resistant, Durable, Adjustable Light Mode (High, Low, Strobe) |
Warranty and Support
Streamlight products are known for their quality and durability. For specific warranty information and support, please refer to the official Streamlight website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
For further assistance, visit: www.streamlight.com
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