Introduction
The NOCO GENIUSPRO50 is a professional-grade, multi-voltage smart battery charger designed for optimal power, performance, and versatility. This advanced unit is capable of charging 6V (50A), 12V (50A), and 24V (25A) batteries, including lead-acid (AGM, gel, SLA, VRLA, flooded, maintenance-free, deep-cycle, marine) and lithium-ion (LiFePO4) types. It also functions as a dual-voltage power supply for ECU flashing, reprogramming, and diagnostic testing, delivering ripple-free power. Integrated thermal sensors prevent overcharging or undercharging based on ambient temperature, while precision pulse charging restores battery health by reversing sulfation and acid stratification.
What's in the Box
Upon opening the package, verify that all components are present and in good condition. The GENIUSPRO50 comes with the following items:
- GENIUSPRO50 6V, 12V, and 24V Battery Charger (120-240VAC)
- Pro HD X-Connect Battery Clamps With Integrated 3/8-Inch (M10) Eyelets
- Pro HD X-Connect 10-Foot (3M) Extension Cable
- Type-B (US), Type-I (AU), Type-G (UK), and Type-E (EU) AC cords
- Portable EVA Storage Case
- (2) Mounting Screws
- User Guide
- 3-Year Warranty Information

Image: The NOCO GENIUSPRO50 charger, various AC cords, battery clamps with eyelets, extension cable, and EVA storage case.
Setup
Before operating the GENIUSPRO50, ensure you are in a well-ventilated area and follow all safety precautions outlined in the user guide.
- Connect the AC Power Cord: Select the appropriate AC cord for your region and connect it to the charger. Plug the AC cord into a suitable wall outlet.
- Connect to Battery: Attach the Pro HD X-Connect Battery Clamps to the battery terminals. Ensure the red clamp is connected to the positive (+) terminal and the black clamp to the negative (-) terminal. For permanent installation, use the integrated eyelets.
- Initial Power-Up: Once connected, the charger will automatically begin charging. The LED indicators on the unit will illuminate to show the charging status and selected mode.

Image: The NOCO GENIUSPRO50 charger with its heavy-duty battery clamps, ready for connection.
Operating Modes
The GENIUSPRO50 offers various operating modes to suit different battery types and conditions. Use the 'MODE' button to cycle through the available options.
- Multi-Voltage Charging: The charger supports 6V, 12V, and 24V batteries. It automatically detects the battery voltage and adjusts accordingly.
- Battery Chemistry Selection: Select between Lead-Acid (including AGM, Gel, Flooded) and Lithium (LiFePO4) battery chemistries for optimized charging.
- 10A Mode: This mode allows the unit to operate at a lower charge current (10A) for smaller batteries or for maintenance charging.
- Force Mode: For extremely discharged batteries (below 1-volt), Force Mode allows manual initiation of charging, enabling the recovery of batteries down to zero volts.
- Supply Mode: Converts the charger into a stable DC power supply (12V 50A or 24V 25A) for applications like ECU flashing, reprogramming, or diagnostic testing, providing clean, ripple-free power.
- Repair Modes: Advanced repair modes are available for 6V, 12V, and 24V batteries. These modes utilize precision pulse charging to reverse sulfation and acid stratification, improving battery performance and extending life.

Image: The NOCO GENIUSPRO50 displaying its ability to charge 6V, 12V, and 24V batteries of various types.

Image: The NOCO GENIUSPRO50 connected to a battery, demonstrating its capability to charge deeply discharged batteries using Force Mode.
Maintenance
The GENIUSPRO50 is designed for minimal maintenance, but understanding its features can help optimize battery health.
- Thermal Compensation: An integrated thermal sensor dynamically adjusts the charge based on ambient temperature. This prevents overcharging in hot climates and undercharging in cold ones, ensuring optimal battery performance and longevity.
- Battery Restoration: The charger's advanced algorithms automatically detect and reverse sulfation and acid stratification, common issues that degrade battery performance over time. This process helps restore lost battery capacity and extends its lifespan.

Image: The NOCO GENIUSPRO50 illustrating its thermal compensation feature, adapting to both hot and cold weather conditions.

Image: The NOCO GENIUSPRO50 demonstrating its ability to restore lost battery performance through automatic detection and repair of sulfation and acid stratification.
Troubleshooting
If you encounter issues with your GENIUSPRO50, consider the following common troubleshooting steps:
- No Power: Ensure the AC power cord is securely plugged into both the charger and the wall outlet. Check the power outlet for functionality.
- Not Charging: Verify that the battery clamps are correctly connected to the battery terminals (red to positive, black to negative). Ensure the battery voltage is within the supported range (6V, 12V, 24V). If the battery is deeply discharged, try using Force Mode.
- Error Indicators: Refer to the detailed error code explanations in the comprehensive user guide for specific issues indicated by the LED lights.
- Overheating: The charger has built-in thermal protection. If it feels excessively hot, disconnect it and allow it to cool in a well-ventilated area before resuming operation.
For persistent issues, consult the full user manual or contact NOCO customer support.
Specifications
| Feature | Specification |
|---|---|
| Brand | NOCO |
| Model | GENIUSPRO50 |
| Item Weight | 12.1 pounds |
| Product Dimensions | 11.4 x 18.2 x 9.8 inches |
| Voltage Compatibility | 6V, 12V, 24V |
| Charging Amperage | 50A (6V/12V), 25A (24V) |
| Battery Types Supported | Lead-Acid (AGM, Gel, SLA, VRLA, Flooded), Lithium (LiFePO4) |
| Special Features | Battery Maintainer, Trickle Charger, Power Supply, Battery Desulfator, Force Mode, IP44 Ingress Protection, Spark-Proof, Reverse Polarity Protection, Temperature Compensation |
| Output Voltage (Power Supply) | 12 Volts (50A), 24 Volts (25A) |
Warranty and Support
The NOCO GENIUSPRO50 comes with a 3-Year Warranty. For warranty claims, technical support, or any questions regarding your product, please refer to the contact information provided in your user guide or visit the official NOCO website. Ensure you retain your proof of purchase for warranty validation.





