Introduction
Thank you for choosing the OLIGHT I3T EOS 180 Lumens Dual-Output Slim EDC Flashlight. This compact and lightweight flashlight is designed for everyday carry, offering reliable illumination for various activities such as camping, hiking, and general utility. It features a simple tail switch for easy operation and is powered by a single AAA battery. This manual provides essential information for the safe and effective use of your new flashlight.

Image: The OLIGHT I3T EOS flashlight in Desert Tan, showcasing its compact design and pocket clip.
Safety Information
- Do not shine the light directly into human or animal eyes.
- Keep the flashlight out of reach of children.
- Do not disassemble the flashlight head as this may damage the light and void the warranty.
- Ensure batteries are inserted with correct polarity to prevent damage.
- Dispose of used batteries according to local regulations.
Package Contents
- OLIGHT I3T EOS Flashlight x 1
- AAA Alkaline Battery x 1
- User Manual x 1

Image: The OLIGHT I3T EOS flashlight, its packaging, an AAA battery, and the user manual.
Product Overview
The I3T EOS features a high-performance CW LED and a TIR optic lens, producing a soft and balanced beam. Its body is designed with a double helix milling pattern for enhanced grip and a distinctive style. The dual-direction pocket clip allows for versatile carrying options.

Image: Diagram illustrating the high-performance CW LED and TIR optic lens, capable of producing up to 180 lumens.

Image: Exploded view of the OLIGHT I3T EOS, showing its internal components including the lens, O-ring, PCB part, lamp body, and tail components.
Setup: Battery Installation
The OLIGHT I3T EOS is powered by one AAA alkaline battery, which is included in the package.
- Unscrew the tail cap of the flashlight by turning it counter-clockwise.
- Insert the AAA battery with the positive (+) end facing towards the head of the flashlight.
- Screw the tail cap back on clockwise until it is securely tightened. Ensure the tail cap is fully tightened to maintain water resistance and proper electrical contact.

Image: The OLIGHT I3T EOS flashlight with its dimensions (3.5 inches long, 0.59 inches wide) and weight (1.45 oz), highlighting its compact size and AAA battery power source.
Operating Instructions
The I3T EOS features a simple tail switch for easy control of its two brightness modes.
- Momentary On (Low Mode): Lightly press the tail switch for momentary low output (5 lumens). Release to turn off.
- Constant On (Low Mode): Fully press the tail switch once to turn on the flashlight in low output (5 lumens).
- High Mode: From constant low mode, quickly press the tail switch again (within 0.5 seconds) to switch to high output (180 lumens).
- Turn Off: From either constant low or high mode, fully press the tail switch to turn the flashlight off.
The flashlight does not have a memory function and will always start in low mode when turned on.

Image: A person using the OLIGHT I3T EOS flashlight to illuminate a bicycle chain, demonstrating its utility for detailed tasks.

Image: A collage showing various applications of the OLIGHT I3T EOS, including carrying in a pocket, illuminating a backpack, working on a bicycle, and inspecting an engine bay.
Maintenance
- Keep the flashlight clean, especially the threads and O-rings. Lubricate O-rings periodically with silicone grease to maintain water resistance.
- If the flashlight is not used for an extended period, remove the battery to prevent leakage.
- The I3T EOS is IPX8 waterproof, meaning it is protected against continuous immersion in water up to 2 meters. Ensure the tail cap is fully tightened before exposure to water.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. |
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| Light is dim or flickers. |
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Specifications
| Brand | OLIGHT |
| Model | I3T EOS |
| Brightness (High) | 180 Lumens |
| Brightness (Low) | 5 Lumens |
| Power Source | Battery Powered |
| Battery Type | 1 x AAA Alkaline Battery (included) |
| Light Source Type | LED |
| Material | Aluminum |
| Product Dimensions | 3.5"D x 0.59"W x 0.59"H (89mm x 15mm x 15mm) |
| Item Weight | 1.4 ounces (41g) |
| Water Resistance Level | IPX8 (Waterproof) |
Warranty
OLIGHT offers a lifetime warranty for products purchased after January 1st, 2023. Please refer to the official OLIGHT website or your purchase documentation for full warranty terms and conditions.
Support
For further assistance, technical support, or warranty claims, please contact OLIGHT customer service through their official website or the retailer where the product was purchased.
You can visit the official OLIGHT store for more information: OLIGHT Store





