Introduction
This manual provides essential instructions for the safe and effective use, charging, and maintenance of your Hart 20-Volt Lithium-Ion 2.0Ah Battery. Please read all instructions carefully before using the battery.

Image: The Hart 20-Volt Lithium-Ion 2.0Ah Battery, black with blue accents, featuring the 'HART / 20V LITHIUM ION 2Ah' label.
Setup
Charging the Battery
To charge your Hart 20-Volt Lithium-Ion battery, follow these steps:
- Ensure the charger is properly plugged into a functional wall outlet. A steady red light on the charger indicates power.
- Slide the battery onto the charger until it clicks securely into place.
- Upon connection, the charger will display a flashing red light, indicating it is testing the battery's charge level.
- After testing, a flashing green light will indicate that the battery is actively charging.
- Once the battery is fully charged, the light will turn a steady green. The battery is now ready for use.
- If a flashing red light (dot-dot-long steady) appears, it indicates an error or a faulty battery that cannot take a charge.
Video: This video demonstrates how to charge a Hart 20-Volt Lithium-Ion battery and explains the meaning of the charger's indicator lights (Power, Testing, Charging, Charged, Error).
Attaching and Detaching from Tools
To attach the battery to a compatible Hart 20-Volt tool, align the battery with the tool's battery slot and slide it in until it locks securely. To detach, press the blue release button on the battery and slide it off the tool.
Operating the Battery
The Hart 20-Volt Lithium-Ion 2.0Ah Battery is designed to power a range of Hart 20-Volt cordless tools. Ensure the battery is fully charged before use for optimal performance. The 2.0Ah capacity provides a balance of power and runtime for various tasks.
- Compatibility: Use only with Hart 20-Volt tools and chargers.
- Performance: Lithium-ion technology provides consistent power throughout the discharge cycle.
- Battery Life: The actual runtime will vary depending on the tool, application, and intensity of use.
Maintenance
Proper maintenance ensures the longevity and performance of your battery:
- Storage: Store batteries in a cool, dry place away from direct sunlight and extreme temperatures. Avoid storing fully discharged batteries for extended periods.
- Cleaning: Keep battery terminals clean and free of debris. Use a dry cloth to wipe the battery exterior.
- Charging: Do not overcharge or leave batteries on the charger indefinitely after they are fully charged.
- Disposal: Dispose of lithium-ion batteries responsibly according to local regulations. Do not dispose of in household waste or by incineration.
Troubleshooting
If you encounter issues with your Hart 20-Volt Lithium-Ion Battery, refer to the following common troubleshooting tips:
- Battery Not Charging (Flashing Red Error Light):
- Ensure the charger is properly plugged into a working outlet.
- Verify the battery is securely seated on the charger.
- Check for any visible damage to the battery or charger.
- If the error light persists, the battery may be faulty or at the end of its lifespan.
- Short Runtime:
- Ensure the battery is fully charged before use.
- Battery capacity can decrease over time with repeated use. Consider replacing older batteries.
- Extreme temperatures can affect battery performance; operate and store within recommended ranges.
- Battery Overheating:
- Allow the battery to cool down before charging or using if it feels excessively warm.
- Do not use or charge a battery that is severely hot.
Specifications
| Brand | Hart |
| Model Number | HPB02 |
| Voltage | 20-Volt |
| Battery Capacity | 2.0Ah (Amp Hours) |
| Battery Cell Composition | Lithium Ion |
| Item Weight | 15.2 ounces |
| Package Dimensions | 6.02 x 5.94 x 3.07 inches |
| Recommended Uses | Power Tool |
Warranty and Support
Specific warranty information and customer support contact details are typically provided with your product packaging or on the official Hart Tools website. Please refer to those resources for the most accurate and up-to-date information regarding your battery's warranty and for technical assistance.