Introdución
The NOCO Genius G3500 is an advanced, safe, and versatile 6V/12V 3.5 Amp battery charger and maintainer. It is designed to charge and maintain all types of lead-acid and lithium-ion batteries up to 120 Amp-Hours, including Wet (Flooded), Gel, MF (Maintenance-Free), CA (Calcium), EFB (Enhanced Flooded Battery), AGM (Absorption Glass Mat), and LiB (Lithium Ion) batteries. The G3500 features an onboard microcomputer that monitors battery activity for safe and efficient charging, automatically minimizing energy consumption. It also provides redundant levels of safety protection, including spark-proof technology, reverse polarity, and overcharge protection. This charger can remain safely connected 24/7, making it ideal for year-round battery maintenance.

Figure 1: The NOCO Genius G3500 Battery Charger and its included accessories.
O que hai na caixa
Your NOCO Genius G3500 package includes the following items:
- G3500 UltraSafe Battery Charger
- Batería Clamps with Integrated Eyelet Terminals
- Guía de usuario
- Información da garantía limitada de 5 anos

Figure 2: All components included in the NOCO Genius G3500 package.
Configuración e conexión
Before using the charger, carefully read the battery manufacturer's specific precautions and recommended rates of charge for the battery. Make sure to determine the voltage and chemistry of the battery by referring to your battery owner's manual prior to charging.
- Asegúrate de que o cargador estea desconectado da toma de corrente alterna.
- Conecte a batería clamps or eyelet terminals to the battery. Connect the positive (+) red clamp to the positive battery terminal and the negative (-) black clamp ao terminal negativo da batería. Asegúrese de que a conexión sexa segura.
- Plug the charger into a standard 120-volt 50-60Hz electrical system outlet.
- Select the appropriate charging mode for your battery type and voltage using the MODE button.

Figure 3: Proper connection of the G3500 to a vehicle battery for charging or maintenance.

Figure 4: The G3500 charging a motorcycle battery, suitable for various power sport vehicles.
Modos de funcionamento
The G3500 offers various charging modes to suit different battery types and conditions. Use the "MODE" button to cycle through the available options. The charger's intuitive LED indicators provide visual state-of-charge feedback and diagnostic information.

Figure 5: Detailed explanation of each charging mode available on the G3500.
Descricións do modo:
- Modo de espera: No power is provided to the battery. In this mode, the charger draws minimal power from the electrical outlet. An orange LED illuminates.
- 12V NORM (14.5V | 3.5A | 2-120Ah Batteries): Designed for charging 12-volt Wet Cell, Gel Cell, Enhanced Flooded, Maintenance-Free, and Calcium batteries. A white LED illuminates.
- 12V COLD/AGM (14.8V | 3.5A | 2-120Ah Batteries): Optimized for charging 12-volt batteries in cold temperatures (below 50°F / 10°C) or AGM batteries. A blue LED illuminates.
- 12V NORM [Small] (14.5V | 900mA | 2-35Ah Batteries): For charging smaller 12-volt Wet Cell, Gel Cell, Enhanced Flooded, Maintenance-Free, and Calcium batteries. A white LED illuminates.
- 12V COLD/AGM [Small] (14.8V | 900mA | 2-35Ah Batteries): For charging smaller 12-volt batteries in cold temperatures (below 50°F / 10°C) or AGM batteries. A blue LED illuminates.
- 6V NORM (7.25V | 3.5A | 2-120Ah Batteries): For charging 6-volt Wet Cell, Gel Cell, Enhanced Flooded, Maintenance-Free, and Calcium batteries. A white LED illuminates.
- 12V LITHIUM (14.2V | 3.5A | 2-120Ah Batteries): Specifically for safely charging and maintaining 12-volt lithium-ion batteries, including Lithium Iron Phosphate. A blue LED illuminates.
- 12V REPAIR (16.5V | 1.5A | Any Capacity): An advanced battery recovery mode for repairing and restoring old, idle, damaged, stratified or sulfated batteries. A red LED illuminates and flashes.
Mantemento da batería
The G3500 is designed to be safely connected 24/7 to maintain your battery's charge. This is ideal for vehicles in long-term storage, ensuring optimal performance and longevity. The charger automatically monitors battery activity and adjusts its output to prevent overcharging, providing a worry-free solution for year-round battery care.

Figure 6: The G3500 provides worry-free maintenance, preventing overcharge and allowing continuous connection.
Especificacións técnicas
| Característica | Detalle |
|---|---|
| Fabricante | NOCO |
| Modelo | G3500 |
| Peso do elemento | 2.15 libras |
| Dimensións do produto | 7.7 x 2.7 x 1.9 polgadas |
| Ampera | 3.5 Amps |
| Voltage | 6 V/12 V |
| Compatibilidade da batería | 6-volt and 12-volt lead-acid (Wet, Gel, AGM), and lithium-ion batteries up to 120Ah. |

Figure 7: Physical dimensions of the NOCO Genius G3500 charger.

Figure 8: Battery types supported and approximate charging durations for various capacities.
Resolución de problemas
If the charger is not operating as expected, consider the following common issues and solutions:
- Sen alimentación/LED apagados: Ensure the charger is securely plugged into a live AC outlet. Test the outlet with another device to confirm it is functioning.
- Error LED (Red): This typically indicates a reverse polarity connection (positive and negative clamps are swapped) or a severely damaged battery. Disconnect the charger, correct the connections, and re-attempt. If the error persists, the battery may be beyond recovery or incompatible with the charger.
- A carga non avanza: Verify that the correct charging mode has been selected for your battery type and voltage. Ensure good contact between the clamps/eyelets and the battery terminals. For deeply discharged batteries, the charger may take longer to initiate charging or require the "12V REPAIR" mode.
- O cargador quéntase: It is normal for the charger to become warm during operation, especially during the bulk charging phase. This is part of its normal function.
For further assistance, refer to the detailed user guide included with your product or contact NOCO customer support.
Garantía e Soporte
The NOCO Genius G3500 comes with a 5-year limited warranty. For warranty claims, technical support, or additional product information, please visit the official NOCO websitio ou póñase en contacto co seu departamento de atención ao cliente.
Official NOCO Websitio: non. co





