Introduction
The eLinkSmart YL-P9bf Smart Fingerprint Padlock offers advanced security with convenient keyless access. This heavy-duty, waterproof padlock can be unlocked using your fingerprint or via a mobile application, providing flexible control for various applications such as gates, lockers, and warehouses. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and security.
Product Features
- Remote Authorization Unlock: Grant temporary or scheduled access to family, friends, or colleagues via the mobile application. Monitor unlock records including time, location, and user.
- Fingerprint Unlock: Your finger serves as the key. Supports up to 20 users (2 administrators, 18 general users) with a 0.5-second unlock speed. Eliminates the need for physical keys.
- Extended Battery Life & USB Charging: Features a 320mAh rechargeable lithium battery, providing up to 6 months of standby time or over 2000 unlocks. Can be charged via USB, even when the battery is depleted.
- High Security & Heavy-Duty Design: Constructed with a 1 CM diameter stainless steel shackle, capable of withstanding over 2600 pounds (11600N) of pulling force for superior cut resistance.
- Waterproof Design: Engineered to withstand outdoor conditions, ensuring reliable operation in various environments.
Package Contents
- 1 x eLinkSmart YL-P9bf Smart Fingerprint Padlock
- 1 x USB Charging Cable
- 1 x User Manual
Initial Setup
1. Charging the Padlock
Before first use, fully charge the padlock. The padlock features a USB charging port, typically located on the side or bottom. Connect the provided USB cable to the padlock and a power source (e.g., computer, USB wall adapter). The indicator lights will show charging status.

Image: The eLinkSmart YL-P9bf Smart Padlock with its USB charging port visible, indicating where to connect the charging cable.
2. App Installation and Pairing
- Download the eLinkSmart app from your device's app store (available for iOS and Android).
- Ensure Bluetooth is enabled on your smartphone or tablet.
- Open the eLinkSmart app and create an account or log in.
- Wake up the padlock by touching the fingerprint sensor. The indicator lights will illuminate.
- In the app, follow the prompts to add a new device. The app will search for nearby eLinkSmart padlocks.
- Select your padlock from the list to pair it.

Image: The eLinkSmart YL-P9bf Smart Padlock with its accompanying mobile application interface shown on a smartphone and smartwatch, demonstrating app control.
Video: This video demonstrates the eLinkSmart padlock's fingerprint and app unlock capabilities, highlighting its powerful features and ease of use with the mobile application.
3. Fingerprint Registration
- After pairing, navigate to the 'User Management' or 'Fingerprint Management' section within the eLinkSmart app.
- Select 'Add Fingerprint' and follow the on-screen instructions. You will be prompted to place your finger on the padlock's sensor multiple times from different angles to ensure accurate registration.
- Register at least one administrator fingerprint. The first registered fingerprint is typically designated as the administrator.
- You can add additional user fingerprints as needed, up to the maximum supported by the device.

Image: A close-up view of a finger being placed on the fingerprint sensor of the eLinkSmart YL-P9bf Smart Padlock, illustrating the fingerprint registration process.
Operating Instructions
1. Unlocking with Fingerprint
- Wake up the padlock by touching the fingerprint sensor. The indicator lights will turn on.
- Place your registered finger firmly on the fingerprint sensor.
- If the fingerprint is recognized, the padlock will unlock with an audible click, and the shackle will release.

Image: A hand demonstrating the fingerprint unlock feature of the eLinkSmart YL-P9bf Smart Padlock by placing a finger on the sensor.
2. Unlocking with Mobile App
- Ensure your smartphone's Bluetooth is active and the padlock is within range.
- Open the eLinkSmart app. The app will automatically connect to the padlock if it's awake.
- Tap the 'Unlock' button within the app interface.
- The padlock will unlock, and the shackle will release.

Image: A smartphone screen showing the eLinkSmart mobile application with an 'Unlock' button, positioned next to the smart padlock, illustrating app-based unlocking.
3. Remote Authorization
The eLinkSmart app allows you to remotely authorize other users to unlock the padlock. This feature is useful for granting temporary access to guests, housekeepers, or employees without needing to be physically present.
- In the eLinkSmart app, navigate to 'Authorization Management'.
- Select 'Add User' and enter the recipient's details.
- Set the desired unlock period and schedule for the authorized user.
- The authorized user will receive an invitation to use the lock via their own eLinkSmart app.
4. Locking the Padlock
To lock the padlock, simply push the shackle firmly back into the padlock body until it clicks into place. The padlock will automatically lock.
Maintenance
Battery Management
- Monitor the battery level through the eLinkSmart app.
- Recharge the padlock using the provided USB cable when the battery indicator shows low power.
- The padlock is designed to remain locked even if the battery completely depletes. Connect a USB power source to temporarily power it for unlocking.
Waterproofing
The eLinkSmart YL-P9bf padlock is designed to be waterproof, making it suitable for outdoor use. However, it is recommended to avoid prolonged submersion or exposure to extreme weather conditions to maximize its lifespan.

Image: The eLinkSmart YL-P9bf Smart Padlock with water being poured over it, showcasing its waterproof design and suitability for outdoor use.
Troubleshooting
- Padlock not responding: Ensure the padlock is charged. Touch the fingerprint sensor to wake it up.
- Fingerprint not recognized: Ensure your finger and the sensor are clean and dry. Try placing your finger from different angles. If issues persist, re-register your fingerprint through the app.
- App connection issues: Verify Bluetooth is enabled on your device and the padlock is awake and within range. Restart the app or your device if necessary.
- Cannot unlock via app: Check the padlock's battery level. Ensure the app is updated to the latest version.
- Accidental factory reset: If the lock is accidentally reset, all registered fingerprints and app pairings will be deleted. You will need to re-pair the lock with the app and re-register fingerprints.
Product Specifications
| Feature | Specification |
|---|---|
| Brand | eLinkSmart |
| Model Name | YL-P9bf |
| Lock Type | Biometric |
| Material | Metal |
| Item Weight | 0.36 Kilograms (12.7 ounces) |
| Product Dimensions (L x W x H) | 2 x 6 x 4 inches |
| Special Features | 320mAh Long Running Time battery, Heavy Duty, 2600 pound Max Tensile Strength, Keyless, Support iOS Watch |
| Control Method | App |
| Shackle Diameter | 1 CM |

Image: A technical diagram illustrating the dimensions of the eLinkSmart YL-P9bf Smart Padlock, including shackle and body measurements.
Warranty and Customer Support
eLinkSmart provides a 6-month warranty for the YL-P9bf Smart Fingerprint Padlock and free lifetime customer service. For any questions or issues regarding fingerprint registration, app usage, or other product concerns, please feel free to contact us.
Email: aaron@elinksmart.com
When returning an item, please ensure you reset the lock and delete all administrator fingerprints, as there is no other way to open the lock once the administrator fingerprints are removed.





