1. Important Safety Instructions
Please read and understand all safety information before using this battery charger. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always wear eye protection and protective clothing when working with batteries.
- Ensure adequate ventilation during charging to prevent gas accumulation.
- Keep the charger away from flammable materials.
- Do not expose the charger to rain or wet conditions.
- This charger features comprehensive protection against reverse polarity, short-circuit, over-current, overheat, over-voltage, low-voltage, electric shock, and fire. However, always ensure correct connections.
- Do not attempt to charge frozen or damaged batteries.
2. Product Overview
The Aumotop 20A Automatic Smart Battery Charger is designed for efficient and safe charging of various 12V and 24V batteries. It features intelligent charging, multiple protection functions, and a user-friendly color display.

Image: Aumotop Automatic Smart Battery Charger with Color Screen Design.
Key Features:
- Fully-Automatic Operation: Automatically detects battery voltage (12V or 24V) and adjusts charging parameters.
- Wide Battery Compatibility: Compatible with lead-acid, LiFePo4, Calcium, Gel, AGM, and Wet batteries.
- Intelligent Color Display: Provides real-time information on current voltage, current, battery level, and temperature.
- Multi-Protection Features: Includes reverse polarity, short-circuit, over-current, overheat, over-voltage, low-voltage, electric shock, and fire protection.
- Battery Repair Function: Pulse repair mode helps to restore depleted and sulfated batteries.
- Winter/Summer Mode: Automatically adjusts charging voltage based on ambient temperature.
- Portable Design: Features a unique design for easy cord winding and storage.
3. Setup and Connection
Follow these steps to safely connect your Aumotop battery charger:
- Ensure the charger is unplugged from the power outlet.
- Connect the red (+) clamp to the positive (+) terminal of the battery.
- Connect the black (-) clamp to the negative (-) terminal of the battery.
- Plug the charger into a standard 220V household power supply. The charger will power on and automatically detect the battery type and voltage.

Image: Diagram illustrating simple connection steps for 12V and 24V batteries.
4. Operating Instructions
The charger operates automatically once connected. You can select specific modes if needed.
4.1 Mode Selection
Press the 'MODE' button to cycle through the available charging modes:
- CAR Mode: For 12V/24V standard lead-acid batteries (GEL, SLA, WET, DEEP CYCLE, EFB, Calcium).
- AGM/LiFePo4 Mode: For 12V/24V AGM and Lithium Iron Phosphate batteries.
- MOTORCYCLE Mode: For 12V/24V motorcycle batteries.
- REPAIR Mode: For repairing depleted or sulfated batteries (see section 4.3).

Image: Display showing the 9 available charging modes.
4.2 Understanding the Display
The large color screen provides clear information:
- Voltage (V): Displays the current battery voltage.
- Current (A): Shows the charging current in Amperes.
- Battery Level: Indicates the approximate charge level of the battery.
- Temperature (°C): Displays the ambient temperature, which influences charging adjustments.
- Winter/Summer Indicators: Icons will illuminate to show if the charger is in winter or summer charging mode, automatically adjusting for optimal performance.

Image: Close-up of the large color screen displaying charging information.
4.3 Battery Repair Function
The pulse repair function is designed to help recover old, depleted, or sulfated batteries. To use:
- Connect the charger to the battery.
- Select the 'REPAIR' mode using the mode selection button.
- The repair process can take approximately 16 hours. Monitor the battery during this process.

Image: Visual representation of the one-click battery repair function.
5. Maintenance and Storage
Proper maintenance and storage ensure the longevity of your charger.
- Clean the charger casing with a dry cloth. Do not use harsh chemicals or abrasives.
- Ensure the cooling fan vents are clear of obstructions for optimal heat dissipation.
- Utilize the unique design on the back of the charger to wind and store power cords and clips neatly.

Image: The portable storage design on the back of the charger for neat cable management.
6. Troubleshooting
If you encounter issues, refer to the following common troubleshooting tips:
- Charger not turning on: Ensure the charger is properly plugged into a live power outlet and the battery clamps are correctly connected to the battery terminals.
- Error message on display: Check all connections for proper polarity (red to positive, black to negative). The charger's built-in protections will prevent operation if connections are incorrect or if there's a fault.
- Battery not charging: Verify that the correct charging mode is selected for your battery type. Ensure the battery is not severely damaged or frozen.
- Overheating: The intelligent cooling fan system should prevent overheating. Ensure the fan vents are not blocked. If the charger still overheats, discontinue use and contact support.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | GOT6939456893430JB |
| Input Voltage | 220V AC (Standard Household) |
| Output Voltage | 12V / 24V DC (Automatic Detection) |
| Max Charging Current | 20A (12V) / 10A (24V) |
| Battery Capacity (12V) | 2AH - 300AH |
| Battery Capacity (24V) | 2AH - 150AH |
| Compatible Battery Types | Lead-Acid (GEL, SLA, WET, DEEP CYCLE, EFB, Calcium), AGM, LiFePo4 |
| Protection Features | Reverse Polarity, Short-Circuit, Over-Current, Overheat, Over-Voltage, Low-Voltage, Electric Shock, Fire Protection |
| Cooling System | Intelligent Silent Fan |
| Dimensions | 3.74 x 4.92 x 3.74 inches |
| Item Weight | 2.64 pounds (1.2 Kilograms) |

Image: Overview of the charger's product characteristics and features.
8. Warranty and Support
Aumotop offers a 24-month warranty for this product. For any questions or concerns, please contact Aumotop customer service, available 7 days a week, 24 hours a day.
Contact information can typically be found on the product packaging or the official Aumotop website.