Introduction
Thank you for choosing the XOSS XL800 Rechargeable Bike Light. This manual provides essential information for the proper setup, operation, and maintenance of your new bike light. Please read it thoroughly before use to ensure optimal performance and safety.

The XOSS XL800 bike light features an aluminum alloy body, 800 lumens of light, and is designed for handlebar or GoPro adapter installation.
Package Contents
Verify that all the following items are included in your package:
- XOSS XL800 Headlight
- Micro-USB Charging Cable
- GoPro Adapter
- GoPro Adapter Bolt
- Handlebar Mount
- User Manual

Illustration of the XOSS XL800 package contents.
Setup and Installation
The XL800 bike light offers versatile mounting options to suit your preference.
Handlebar Mount Installation
- Secure the handlebar mount to your bicycle's handlebar using the provided strap or clamp. Ensure it is tightened securely to prevent movement during rides.
- Slide the XOSS XL800 headlight onto the handlebar mount until it clicks into place.
- Adjust the angle of the light to ensure optimal illumination of your path without blinding oncoming traffic.
GoPro Adapter Installation
The XL800 supports both normal and inverted installation when using the GoPro adapter, allowing for flexible positioning, including under a bike computer mount.
- Attach the GoPro adapter to your existing GoPro-compatible mount (e.g., under a bike computer mount) using the GoPro adapter bolt.
- Slide the XOSS XL800 headlight onto the GoPro adapter until it locks securely.
- Verify that the light is firmly attached and adjust its direction as needed.

The XL800 can be easily mounted and removed from its bracket.
Operating Instructions
The XOSS XL800 features a single button for all operations.
Power On/Off
- To turn the light ON: Press and hold the power button for approximately 2 seconds.
- To turn the light OFF: Press and hold the power button for approximately 2 seconds.
Switching Modes
Once the light is on, short press the power button to cycle through the available lighting modes:
- High Light (800 lumens)
- Medium Light (400 lumens)
- Low Light (200 lumens)
- Flash (400 lumens)
- SOS (400 lumens)

The XL800 offers five distinct lighting modes for various riding conditions.
Charging
The XOSS XL800 is equipped with a micro-USB charging interface and a 2000 mAh high-capacity rechargeable battery.
- Locate the micro-USB charging port on the light.
- Connect the provided micro-USB cable to the light and plug the other end into a USB power source (e.g., computer, wall adapter, power bank).
- The power indicator light will show the charging status. A full charge typically takes approximately 2.5 hours.
- Disconnect the charging cable once fully charged.
The power indicator allows real-time monitoring of the battery level, ensuring you can recharge it in a timely manner.

The XL800 features a 2000mAh battery, providing up to 2.5 hours in high mode and longer in lower modes.
Maintenance
- Cleaning: Wipe the light with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the light in a cool, dry place when not in use. Avoid extreme temperatures.
- Battery Care: For optimal battery life, charge the light regularly, even if not used frequently. Avoid fully discharging the battery for extended periods.
- Water Resistance: The XL800 is IPX7 waterproof. While it can withstand rain and splashes, avoid prolonged submersion. Ensure the USB port cover is securely closed to maintain water resistance.

The XL800's waterproof design ensures functionality in various weather conditions.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | Low battery; Incorrect operation | Charge the battery; Press and hold the power button for 2 seconds to turn on. |
| Light turns off unexpectedly | Low battery | Recharge the battery. |
| Light is dim | Low battery; Incorrect mode selected | Charge the battery; Cycle through modes to select a brighter setting. |
| Mount is loose | Mount not tightened sufficiently | Re-tighten the handlebar mount or GoPro adapter bolt. |
Specifications
| Feature | Detail |
|---|---|
| Model | XL800 |
| Brand | XOSS |
| Material | Aluminum Alloy |
| Maximum Light Output | 800 Lumens |
| Battery Capacity | 2000 mAh |
| Charging Interface | Micro-USB |
| Waterproof Rating | IPX7 |
| Product Weight | 122 Grams |
| Mounting Type | Handlebar Mount, GoPro Adapter |
| Lighting Modes | High, Medium, Low, Flash, SOS |
Warranty and Support
The XOSS XL800 bike light comes with a one-year warranty from the date of purchase. This warranty covers manufacturing defects under normal use.
For warranty claims, technical support, or any questions regarding your product, please contact XOSS customer service through the retailer where you purchased the product or visit the official XOSS website for contact information.
Please retain your proof of purchase for warranty validation.





