Introduction
The Klarus XT11R is an advanced tactical flashlight designed for reliability and performance in various environments. It features a powerful 1300-lumen output, a long beam distance, and extended battery life, making it suitable for law enforcement, outdoor activities, and everyday carry. Its intuitive dual-switch design allows for rapid mode changes and quick access to tactical functions like strobe.
Product Overview
The XT11R flashlight is engineered for durability and ease of use. Below are its key components and features.





Setup
Package Contents
Upon unboxing your Klarus XT11R, please verify that all components are present:
- Klarus XT11R Tactical Flashlight
- USB-C Charging Cable
- User Manual
- Lanyard (if included)
- Spare O-ring (if included)
- Battery (if included, note: some models are sold without battery)

Battery Installation
- Unscrew the tail cap of the flashlight by turning it counter-clockwise.
- Insert the 18650 Li-ion battery (if included, or a compatible battery) with the positive (+) end facing towards the head of the flashlight. The XT11R is designed for 18650 batteries.
- Screw the tail cap back on clockwise until it is securely tightened. Ensure it is fully tightened to maintain water resistance and proper electrical contact.
Initial Charging
Before first use, it is recommended to fully charge the flashlight battery.
- Locate the USB-C charging port on the side of the flashlight. It is usually covered by a rubber flap for protection.
- Open the rubber flap and insert the provided USB-C cable into the port.
- Connect the other end of the USB-C cable to a compatible USB power source (e.g., wall adapter, computer USB port, power bank).
- The indicator light near the charging port will show the charging status. It typically turns red during charging and green when fully charged.
- Once charging is complete, disconnect the cable and securely close the rubber flap to protect the port from dust and water.

Operating Instructions
The XT11R features a dual-switch tail cap for intuitive control and quick access to various lighting modes.
Tail Switches
- Primary Switch (Larger Button):
- Press fully to turn the flashlight ON/OFF.
- Half-press and hold for momentary ON (releases to OFF).
- Mode Switch (Smaller Button):
- When the light is ON, press to cycle through lighting modes: High → Medium → Low.
- When the light is OFF, press and hold for One-Touch Strobe.
- When the light is ON, press and hold for One-Touch Strobe. Release to return to the previous mode.
Lighting Modes
- High: Maximum brightness (1300 lumens) for powerful illumination.
- Medium: Balanced brightness for general use and extended runtime.
- Low: Minimal brightness for close-range tasks and maximum battery life.
- Strobe: Disorienting flashing light for tactical situations or signaling.


Maintenance
Proper maintenance ensures the longevity and optimal performance of your Klarus XT11R flashlight.
- Cleaning: Regularly clean the flashlight body with a soft, damp cloth. For the lens, use a lens cleaning cloth and solution to avoid scratches.
- Lubrication: Apply a thin layer of silicone grease to the O-rings and threads periodically to maintain water resistance and smooth operation.
- Battery Care:
- Remove the battery if the flashlight will not be used for an extended period to prevent leakage.
- Store batteries in a cool, dry place.
- Do not over-discharge or over-charge batteries.
- Water Resistance: The XT11R is IPX8 rated (submersible up to 2 meters). Ensure the tail cap is fully tightened and the USB-C port cover is sealed before exposing to water.

Troubleshooting
If you encounter issues with your XT11R flashlight, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Battery low or depleted; Incorrect battery insertion; Loose tail cap; Dirty contacts. | Charge or replace battery; Ensure positive end faces head; Tighten tail cap; Clean battery and flashlight contacts with an alcohol swab. |
| Light flickers or turns off unexpectedly. | Loose tail cap; Low battery; Overheating. | Tighten tail cap; Charge battery; Reduce brightness mode to allow cooling. |
| Cannot cycle through modes. | Mode switch malfunction; Battery issue. | Ensure battery is fully charged; Contact customer support if issue persists. |
| Charging indicator not working. | Faulty cable or power source; Charging port issue. | Try a different USB-C cable and power source; Ensure port is clean and free of debris. |
Specifications
Detailed technical specifications for the Klarus XT11R Tactical Flashlight.
| Feature | Detail |
|---|---|
| Model | XT11R |
| Brightness | 1300 Lumens (Max) |
| Beam Distance | 300 Meters (Max) |
| Runtime | 144 hours (Max) |
| Light Source Type | LED |
| Power Source | Battery Powered (1 A battery required, included) |
| Battery Cell Composition | NiMH |
| Material | Aluminum 6061-T6 with Mil-Spec HAIII anti-abrasive and anodized finish |
| Water Resistance Level | IPX8 (2 meters submersible) |
| Impact Resistance | 1 Meter |
| Dimensions | 5.7 inches (length), 1 inch (diameter) |
| Item Weight | 4.3 ounces (122 Grams) |
| Special Features | LED Flashlight, Dual Tail Switches, USB-C Rechargeable, Crenelated Bezel |
Warranty and Support
Klarus provides a warranty for its products. For specific warranty terms and conditions, please refer to the official Klarus website or the warranty card included with your product. For technical support, troubleshooting assistance beyond this manual, or warranty claims, please contact Klarus customer service through their official channels.
You can find more information and contact details on the official Klarus website: www.klaruslight.com





