Introduction
The Serfas True 1300 Bicycle Headlight is designed to provide powerful illumination for night riding and enhanced visibility during the day. This manual provides essential information for the proper setup, operation, and maintenance of your headlight to ensure safe and effective use.
What's in the Box
Upon opening your Serfas True 1300 Bicycle Headlight package, verify that all components are present:
- Headlight Unit
- Rechargeable Battery
- Handlebar Mount
- Action Camera Mount
- USB-C Charging Cable
Video: This video demonstrates the contents of the Serfas True 1300 Bicycle Headlight package, showing each included item.
Setup
Battery Installation
The Serfas True 1300 headlight uses a removable rechargeable battery. To install or replace the battery:
- Locate the end cap of the headlight. It has markings for "O" (Open) and "L" (Locked).
- Using a coin or similar flat object, rotate the end cap counter-clockwise to the "O" position to unlock it.
- Gently pull the end cap to remove it. The magnetic cap will assist in pulling out the battery.
- Insert the battery with the "THIS SIDE IN" marking facing inwards.
- Replace the end cap and rotate it clockwise to the "L" position to secure it.

Image: The end cap of the Serfas True 1300 headlight showing the 'O' (Open) and 'L' (Locked) indicators for battery access.

Image: A visual guide demonstrating the steps for battery removal and reinstallation, highlighting the magnetic cap and battery orientation.
Mounting the Headlight
The Serfas True 1300 comes with both a handlebar mount and an action camera mount for versatile placement.
- Handlebar Mount: Secure the handlebar bracket to your bicycle's handlebar. The light unit slides onto the mount until it clicks into place. Ensure it is firmly attached.
- Action Camera Mount: Attach the action camera mount to a compatible action camera base. The light unit then slides onto this mount.
Video: This video illustrates the process of attaching the Serfas True 1300 headlight to both the handlebar mount and the action camera mount.

Image: The Serfas True 1300 headlight securely mounted on a bicycle handlebar using the provided bracket.
Operating Instructions
Power On/Off and Mode Selection
The headlight features an easy-touch button for control.
- To turn the light ON, press and hold the power button for approximately 1 second.
- To cycle through the light modes (High, Medium, Low, Low Flash, Daytime Flash), press the power button briefly.
- To switch between steady and flashing modes, press and hold the power button for approximately 2 seconds. The light will briefly turn off and then reactivate in the alternate mode.
- To turn the light OFF, press and hold the power button for approximately 1 second until the light extinguishes.

Image: A detailed view of the oversized easy-touch power button, designed for convenient operation even with gloves.
Video: This video demonstrates how to cycle through the various light modes of the Serfas True 1300 headlight.
Video: This video shows how to lock and unlock the Serfas True 1300 headlight to prevent accidental activation.
Charging the Battery
The Serfas True 1300 headlight features a USB-C charging port for convenient recharging.
- Locate the USB-C charging port on the side of the headlight.
- Connect the provided USB-C cable to the headlight's port.
- Connect the other end of the USB cable to a compatible USB power source (e.g., computer, wall adapter).
- The charging indicator lights will illuminate to show charging status. A full charge typically takes 4 hours and 30 minutes using a 2A USB wall charger.
Video: This video demonstrates the process of recharging the Serfas True 1300 bicycle headlight using the USB-C port.
Maintenance
To ensure the longevity and optimal performance of your Serfas True 1300 Bicycle Headlight, follow these maintenance guidelines:
- Cleaning: Wipe the light body and lens with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the finish or lens.
- Battery Care: For best battery life, avoid fully discharging the battery frequently. Recharge the battery regularly, especially if the light will not be used for an extended period. Store the light and battery in a cool, dry place.
- Water Resistance: The light has an IPX6 water resistance rating, meaning it is protected against high-pressure water jets. While it can withstand rain, avoid submerging it in water. Ensure the USB-C port cover is securely closed when not charging to maintain water resistance.
Troubleshooting
- Light does not turn on:
- Ensure the battery is correctly installed with the "THIS SIDE IN" marking facing inwards.
- Check if the battery is charged. Connect the light to a charger and observe the charging indicator.
- Verify the end cap is securely locked in the "L" position.
- Light does not change modes:
- A quick press of the power button cycles through modes. A longer press (approx. 2 seconds) switches between steady and flashing modes.
- Ensure the light is not in lock mode. If the light is locked, press and hold the power button for 5 seconds to unlock it.
- Light turns off unexpectedly:
- The battery may be low. Recharge the battery fully.
- Check for proper battery connection and ensure the end cap is securely fastened.
Specifications
Key specifications for the Serfas True 1300 Bicycle Headlight:
| Feature | Detail |
|---|---|
| Model Name | True 1300 |
| Model Number | TSL-1300M |
| Maximum Brightness | 1300 Lumens |
| Number of Settings | 5 (High, Medium, Low, Low Flash, Daytime Flash) |
| Power Source | Battery Powered (Rechargeable) |
| Charging Port | USB-C |
| Charging Time | 4 hours 30 minutes (using 2A USB wall charger) |
| Water Resistance Rating | IPX6 |
| Material | Plastic |
| Item Weight | 0.3 Pounds (approx. 136 grams) |
| Mounting Type | Handlebar Mount, Action Camera Mount |
Runtime per Mode:

Image: A table detailing the lumen output and approximate runtime for each of the five operating modes of the Serfas True 1300 headlight.
Dimensions:

Image: A visual representation of the Serfas True 1300 headlight's dimensions (4.5 in. length, 1 in. width, 2 in. height) and weight (6 oz).
Warranty Information
For detailed warranty information regarding your Serfas True 1300 Bicycle Headlight, please refer to the official Serfas website or contact their customer support directly. Keep your proof of purchase for any warranty claims.
Customer Support
If you encounter any issues or have questions not covered in this manual, please visit the official Serfas website for FAQs, additional resources, or to contact their customer service team.



