Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Hart 40 Volt Battery Charger. Please read this manual thoroughly before using the charger to ensure proper function and to prevent potential hazards.
Important Safety Information:
Always refer to the Operator's Manual for specific battery size, type, and number of batteries to be charged. Charging incompatible batteries may result in injury, electric shock, fire, or damage, including battery burst.
Setup
Before first use, ensure the charger is placed on a stable, dry surface away from direct sunlight and moisture. Verify that the power outlet matches the charger's voltage requirements.
Connecting the Charger
1. Insert the charger's power adapter into a standard electrical outlet. The charger is designed for easy connection and portability.

Image: The Hart 40 Volt Battery Charger connected to its power adapter, ready for use. The charger is compact and designed for convenience.
Inserting the Battery
1. Align the slots on your Hart 40V Lithium-Ion battery with the prongs on the charger. Ensure the battery slides smoothly into place until it clicks securely.

Image: A Hart 40V Lithium-Ion battery securely attached to the charger, demonstrating the correct alignment for charging.
Operating the Charger
The Hart 40 Volt Battery Charger features an intuitive LED indicator system to communicate the battery's status during charging.
LED Indicators
The charger's front panel includes several LED lights that provide real-time feedback on the charging process:

Image: A detailed view of the Hart 40V Lithium Ion Charger's LED panel, illustrating the various status indicators.
- Power (Red LED): Indicates the charger is connected to a power source.
- Testing (Red LED): Flashes when the charger is evaluating the battery's condition before charging begins.
- Error (Red LED): Illuminates if there is an issue with the battery or charger. Refer to the Troubleshooting section.
- Charging (Green LED): Flashes during the charging process. The number of illuminated green bars indicates the current charge level.
- Charged (Green LED): Stays solid when the battery is fully charged.
To check the battery's charge level while it's connected, press the 'CHARGE LED' button on the charger. The green LEDs will light up to show the approximate charge remaining.

Image: The Hart 40V Charger with a battery attached, highlighting the 'CHARGE LED' button for checking battery status.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Hart 40 Volt Battery Charger.
Cleaning
Disconnect the charger from the power source before cleaning. Use a soft, dry cloth to wipe down the exterior of the charger. Do not use abrasive cleaners or solvents, as these can damage the plastic components.
Storage
Store the charger in a cool, dry place, away from extreme temperatures and direct sunlight. Ensure the charger and battery are disconnected when not in use for extended periods.
Troubleshooting
If you encounter issues with your Hart 40 Volt Battery Charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not powering on (No Red Power LED) | Not plugged in; Faulty outlet; Damaged power cord. | Ensure charger is securely plugged into a working outlet. Check for damage to the power cord. |
| Error LED is illuminated | Battery fault; Charger fault; Battery too hot/cold. | Remove and reinsert the battery. Allow battery to reach room temperature. If error persists, contact support. |
| Battery not charging (Green Charging LED not flashing) | Battery not properly seated; Battery fully charged; Charger malfunction. | Ensure battery is fully seated. Check if the battery is already fully charged (Solid Green Charged LED). |
Specifications
- Product Dimensions: 9.45 x 8.27 x 7.08 inches
- Item Weight: 15.8 ounces
- Output Voltage: 40 Volts
- Input Voltage: 40 Volts
- Color: White, Black
- Manufacturer: Hart
- Date First Available: March 14, 2020
Warranty and Support
For detailed warranty information regarding your Hart 40 Volt Battery Charger, please refer to the documentation included with your purchase or visit the official Hart Tools website. For technical support or service inquiries, please contact Hart customer service through their official channels.