1. Introduction
This manual provides essential information for the safe and efficient use of your Lankoo 1.5V 12000mWh USB Lithium-ion Rechargeable D Batteries. Please read this manual thoroughly before initial use and retain it for future reference. These batteries are designed to provide reliable and consistent power for a wide range of compatible devices.
2. Product Overview
The Lankoo Rechargeable D Batteries offer a high-capacity, long-lifecycle solution for your power needs. Key features include:
- Rechargeable Design: Eliminates the need for disposable batteries, promoting environmental sustainability and cost savings.
- Type C USB Charging: Convenient direct charging via a Type C USB cable, compatible with various USB power sources.
- LED Indicators: Provides clear visual feedback on charging status.
- Large Capacity: 12000mWh capacity for extended use in high-drain devices.
- Long Lifecycle: Designed for over 1200 charge cycles.
- Constant Output: Delivers a stable 1.5V output throughout discharge.
- Safety Features: Includes over-charge protection and compliance with North American safety standards (CE, FCC, RoHs).
Figure 2.1: Two Lankoo 1.5V 12000mWh USB Lithium-ion Rechargeable D Batteries.
Figure 2.2: Contents of the package, including two D batteries and a dual USB Type-C charging cable.
Figure 2.3: The complete accessory set, showing the batteries, charging cable, and product packaging.
3. Setup
Before first use, it is recommended to fully charge the batteries. Ensure the batteries are compatible with your device's D battery compartment. Insert the batteries with correct polarity (+ and -) as indicated on your device and the batteries themselves.
4. Charging
The Lankoo D batteries feature a convenient built-in Type C USB charging port, eliminating the need for a separate charger.
- Locate the Type C USB port on the side of each battery.
- Connect the included dual Type C USB charging cable to the battery's port(s).
- Plug the USB-A end of the cable into any standard USB power supply, such as an AC adapter, power bank, or computer USB port.
- The LED indicator on the battery will blink red during charging.
- Once fully charged (approximately 4 hours), the LED indicator will remain solid red.
- Disconnect the batteries from the charging cable once charging is complete.
Figure 4.1: Close-up view of the USB Type-C charging port on the battery.
Figure 4.2: Visual representation of the LED indicator: blinking red during charging, solid red when fully charged.
Figure 4.3: Illustration of two batteries being charged simultaneously using the provided dual USB-C cable and a standard wall adapter.
Video 4.1: This video demonstrates the USB charging method for similar Lankoo rechargeable batteries, showing how to connect the cable and the LED indicator behavior during charging.
5. Operation
These batteries provide a constant 1.5V output, ensuring stable performance for your devices throughout their discharge cycle. This differs from traditional NiMH rechargeable batteries which experience a gradual voltage drop. Simply insert the charged batteries into your compatible electronic devices according to the device's polarity markings.
Figure 5.1: Graph illustrating the stable 1.5V constant voltage output of the Lithium battery compared to the declining voltage of a NiMH battery over its discharge cycle.
6. Maintenance
To ensure optimal performance and longevity of your Lankoo rechargeable batteries:
- Recharge the batteries before use if they have been in standby for over 3 months.
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid short-circuiting the batteries.
- Do not disassemble or modify the batteries.
- Keep batteries away from water and fire.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging (LED not blinking/solid) | Loose cable connection, faulty USB power source, or battery issue. | Ensure cable is securely connected. Try a different USB port or power adapter. If the issue persists, contact support. |
| Device not powering on with charged battery | Incorrect battery polarity, device malfunction, or battery fault. | Check battery polarity in the device. Test the battery in another compatible device. If the battery is confirmed faulty, contact support. |
| Battery LED flashing rapidly | Indicates short-circuit protection activated. | Remove the battery from the device/charger immediately. Check for any foreign objects or damage to the battery terminals. If the issue persists, discontinue use and contact support. |
8. Specifications
| Feature | Detail |
|---|---|
| Battery Type | Lithium-ion |
| Size | D |
| Voltage | 1.5V (Constant Output) |
| Capacity | 12000mWh |
| Charging Port | USB Type C |
| Charge Time | Approximately 4 hours |
| Cycle Life | Over 1200 cycles |
| Safety Certifications | CE, FCC, RoHs |
| Manufacturer | LANKOO |
| Country of Origin | China |
9. Warranty and Support
Lankoo Rechargeable D Batteries come with a 12-month warranty. If you encounter any issues during the use of your batteries, please contact the service email provided on the product packaging. You may be eligible for a brand new replacement. For further assistance or inquiries, please refer to the contact information provided with your purchase.