Introduction
Thank you for choosing the DTK 4.0Ah Lithium-Ion Replacement Battery. This manual provides essential information for the safe and effective use of your new battery. Please read these instructions carefully before use and retain them for future reference. This battery is designed to be compatible with Ryobi 18V ONE+ cordless tools, offering reliable power and extended runtime.
Safety Instructions
WARNING: Failure to follow these safety instructions may result in fire, electric shock, or other serious injury.
- Always use the correct charger for lithium-ion batteries.
- Do not expose the battery to water or rain.
- Do not store the battery in direct sunlight or in environments with high temperatures.
- Do not short-circuit the battery terminals.
- Do not attempt to open, disassemble, or modify the battery pack.
- Keep the battery away from children and pets.
- If the battery is damaged, do not use it. Contact customer support.
- Dispose of batteries responsibly according to local regulations.
Product Overview
Specifications
| Specification | Value |
|---|---|
| Battery Type | Lithium-Ion |
| Capacity | 4.0Ah |
| Voltage | 18V |
| Watts | 72Wh |
| Quantity | 2 Packs |
| Compatibility | Ryobi 18V ONE+ tools (P102, P103, P104, P105, P107, P108, P109) |
Key Features
- High Capacity: 4.0Ah provides extended runtime for your tools.
- No Memory Effect: Can be charged or discharged as needed without capacity reduction.
- 4-LED Fuel Gauge: Provides immediate feedback on the battery's state of charge.
- Multi-Protections: Built-in safeguards against over-charging, over-discharging, over-current, over-heating, and short-circuits.
- Durable Design: Sturdy and fire-resistant construction with good heat dissipation.
Product Visuals






Setup and Installation
Inserting the Battery
- Ensure the tool is turned off and disconnected from any power source.
- Align the battery pack with the battery port on your Ryobi 18V ONE+ tool.
- Slide the battery into the tool until it clicks securely into place. Ensure it is fully seated to prevent accidental disconnection during operation.
Removing the Battery
- Ensure the tool is turned off.
- Press and hold the battery release button, typically located on the side or top of the battery.
- Slide the battery out of the tool.
Operating Instructions
Once the battery is securely installed in your compatible Ryobi 18V ONE+ tool, operate the tool according to its specific user manual. The DTK battery provides consistent power output for optimal tool performance.
Monitoring Battery Charge
The 4-LED fuel gauge on the battery provides a quick visual indication of the remaining charge:
- 4 LEDs lit: Full charge (75-100%)
- 3 LEDs lit: High charge (50-75%)
- 2 LEDs lit: Medium charge (25-50%)
- 1 LED lit: Low charge (0-25%), recharge soon
Charging Instructions
The DTK 4.0Ah Lithium-Ion battery is compatible with all original or third-party Ryobi 18V lithium battery chargers. Always follow the instructions provided with your charger for safe and efficient charging.
- Insert the battery pack into the charger. Ensure it is properly seated.
- Connect the charger to a standard power outlet.
- Monitor the charger's indicator lights to determine the charging status.
- Once fully charged, remove the battery from the charger.
IMPORTANT: Do not leave batteries on the charger for extended periods after they are fully charged, as this can reduce battery life.
Maintenance and Storage
General Maintenance
- Keep the battery clean and dry. Wipe off any dirt or debris with a clean, dry cloth.
- Inspect the battery for any signs of damage before each use.
- Avoid dropping the battery or subjecting it to heavy impacts.
Storage
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- For long-term storage, it is recommended to store lithium-ion batteries at approximately 50% charge.
- Do not store batteries near flammable materials or in areas with high humidity.
Troubleshooting
If you encounter issues with your DTK battery, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Charger not plugged in; faulty charger; battery too hot/cold; damaged battery. | Check charger connection; try a different charger; allow battery to reach room temperature; inspect battery for damage. |
| Tool not operating | Battery not fully inserted; battery discharged; tool malfunction. | Ensure battery is clicked into place; charge battery; test with another battery or consult tool manual. |
| Short runtime | Battery not fully charged; battery nearing end of life; heavy tool usage. | Ensure full charge; consider replacing battery if old; reduce continuous heavy load. |
Instructional Video
This video provides a visual overview of the DTK 4.0Ah Battery Replacement for Ryobi 18V ONE+ Battery, demonstrating its features and compatibility.
Warranty and Support
Warranty Information
Your DTK 4.0Ah Lithium-Ion Replacement Battery comes with a 12-month limited warranty from the date of purchase. This warranty covers manufacturing defects and ensures the product meets its stated specifications. Additionally, a 30-day money-back guarantee is offered.
Customer Support
For any questions, concerns, or warranty claims, please contact DTK customer service through the "Your Orders" tab in your Amazon account. We aim to provide a satisfactory solution within 24 hours.
Manufacturer: Shenzhen Henglixinyuan Electronic Technology Co., Ltd