Introduction
The Hulkman Sigma 5 is a versatile 5A smart battery charger and maintainer designed for 12V and 6V lead-acid and LiFePO4 batteries. It features a 3.2-inch LED display for real-time battery status and offers multiple charging modes to optimize battery health and extend lifespan.
Image: Hulkman Sigma 5 Smart Battery Charger with its clear LED display.
Key Features:
- 5A Trickle Charger: Charges batteries up to 5 times faster than Sigma 1, outputting 12V DC 5A / 6V DC 1.8A. Ideal for 15-121Ah (12V) and 6-50Ah (6V) batteries.
- 9 Stages Battery Maintainer: Smart chip optimizes charging with 9 stages, preventing overcharging and overheating. Features auto power-off and float charge restart.
- Clear 3.2-inch LED Display: Shows real-time battery status, voltage, charging mode, and incorrect operations with visible LED icons.
- Revive Depleted Batteries: Loading Mode can restore batteries as low as 0.3V, and Repair Mode can refresh those with over 2V, using pulse charging to desulfate.
- Wide Battery Compatibility: Compatible with 12V / 6V lead-acid (deep cycle, AGM, flooded, gel, wet, MF, EFB, calcium) and 12V lithium (LiFePO4) batteries.
- IP67 Protection: High-strength resin with integral encapsulation ensures dustproof and waterproof performance, suitable for various weather conditions.
What's in the Box
Image: All components included in the Hulkman Sigma 5 package.
- Sigma 5 Smart Battery Charger (x1)
- Battery Clamps (x1)
- Battery Eyelets (x1)
- Wall-mounted Bracket (x1) & Screws (x2)
- User Manual (x1)
Setup
Follow these steps for proper setup of your Hulkman Sigma 5 battery charger:
- Connect Charger to Battery Terminals: Choose between the alligator clamps or eyelet connectors based on your battery's terminals. Ensure a secure connection to the positive (+) and negative (-) terminals.
- Connect to External AC Source: Plug the charger's power cord into a standard 100-240V AC wall socket. The unit will power on and display the current battery voltage.
- Select Charging Mode: Use the mode selection buttons on the charger to choose the appropriate battery type (12V, 12V AGM, 12V Lithium, 6V, 6V AGM, 12V Repair, 12V Loading). Press the 'OK' button to confirm and begin charging.
Image: Proper usage sequence for connecting the Hulkman Sigma 5 charger.
Operating the Sigma 5
The Sigma 5 features an intuitive display and simple controls for various charging needs.
Image: Detailed view of the Sigma 5's 3.2-inch bright LED display.
Charging Modes:
The charger automatically detects the battery type and voltage, but you can manually select specific modes for optimal performance.
Image: All-in-one Sigma 5 Charger modes for various battery types.
- 12V / 6V: For Wet Cell, Gel Cell, Enhanced Flooded, Maintenance-Free, and Calcium batteries.
- 12V AGM / 6V AGM: Specifically for AGM batteries.
- 12V Lithium: Dedicated mode for 12-volt LiFePO4 batteries.
- 12V Repair: For repairing and restoring sulfated, old, idle, damaged, or stratified 12-volt batteries.
- 12V Loading: For charging 12-volt lead-acid batteries with a low voltage between 0.3V and 2V.
Official Product Video:
Video: An official overview of the Hulkman Sigma 5 smart trickle charger, demonstrating its features and ease of use.
Battery Maintenance and Repair
The Sigma 5 is designed to not only charge but also maintain and revive your batteries, extending their overall lifespan.
Image: The Sigma 5's 9-step AI Optimizer maintains peak battery condition.
Repair and Loading Modes:
- Repair Mode: This mode can be activated for 12V batteries that are sulfated or showing signs of damage. It uses pulse charging to help restore the battery's capacity.
- Loading Mode: For deeply discharged 12V lead-acid batteries (0.3V to 2V), this mode initiates a force charge to bring the voltage up to a level where normal charging can resume.
Image: The 12V Loading Mode can revive batteries with voltage as low as 0.3V.
Specifications
| Feature | Detail |
|---|---|
| Brand | Hulkman |
| Model Number | Sigma 5 |
| Amperage | 5 Amps |
| Output Voltage | 12 Volts (also 6 Volts) |
| Item Weight | 1.89 pounds (856 Grams) |
| Product Dimensions | 5.51 x 3.07 x 1.89 inches |
| Country of Origin | China |
| IP Rating | IP67 (Dustproof and Waterproof) |
Troubleshooting
The Sigma 5 is equipped with smart safety alerts to help diagnose and prevent common issues.
Image: Smart Safety Alerts displayed on the Sigma 5 screen.
- Reverse Polarity Protection: If the clamps are connected incorrectly (positive to negative, negative to positive), the charger will alert you to prevent damage. Correct the connection immediately.
- Bad Battery: If the display indicates a "Bad Battery," it means the connected battery may not hold a charge or is severely damaged. Consider using Repair Mode or replacing the battery.
- Temperature Alert: An alert indicating high temperature means the internal temperature of the charger is too high. Disconnect the charger and allow it to cool down in a well-ventilated area.
- Voltage Alert: If the voltage of the connected battery is too high for the selected mode, the charger will display an alert. Ensure the correct voltage mode (6V or 12V) is selected for your battery.
For more detailed troubleshooting, please refer to the full user manual.
Warranty and Support
The Hulkman Sigma 5 comes with a 3-Year Customer Service warranty.
For comprehensive instructions, detailed troubleshooting, and warranty claims, please refer to the official User Guide:
