20A Smart Battery Charger 12V/24V 7-Stage AGM LiFePO4 Repair

Professional 7-Stage Smart Battery Charger

If you're maintaining expensive AGM, LiFePO4, or commercial batteries with a basic charger, you're risking overcharging, false "full charge" readings, and a shortened battery lifespan. This 20A smart charger uses microprocessor-controlled 7-stage charging with pulse repair technology to protect your battery, extend its life, and recover deeply discharged and sulphated batteries that basic 3-stage chargers simply abandon as dead.

Key Features

• 20A Fast Charging: High-amperage output cuts charge time significantly compared to standard 10A chargers, ideal for larger batteries in bakkies, trucks, and commercial vehicles.
• 7-Stage Smart Charging Process: Fully automatic charging with intelligent stage progression protects your battery from overcharging. Safe to leave connected indefinitely.
• Pulse Repair Technology: Breaks down lead-sulphate crystal buildup to revive aged, deeply discharged, and sulphated batteries other chargers abandon.
• Automatic Desulphation: Restores lost battery capacity by removing harmful sulphation buildup during the charging process.
• Universal Battery Compatibility: Supports Lead-Acid, AGM, Gel, LiFePO4, EFB, and Calcium batteries from 6Ah up to 300Ah.
• 12V and 24V Dual Voltage: Automatically detects voltage. Charges cars, motorcycles, bakkies, trucks, buses, and heavy commercial vehicles.
• Temperature Compensation: Summer and Winter modes automatically adjust charging voltage based on ambient temperature, preventing overcharging in heat and undercharging in cold.
• Large LCD Display: Real-time readout of voltage, current, temperature, charge percentage, and active charging stage, clearly visible in sunlight.
• PC Fireproof Shell: Shock-resistant, corrosion-resistant construction rated for workshop and garage environments.
• Multiple Safety Protections: Reverse polarity, overcurrent, overvoltage, overtemperature, and short circuit protection built in.
• Neat Cable Storage: Built-in clamp storage clips keep cables tidy and organised when not in use.
• Universal Power Input: 100-240V AC input works with standard South African 220V home and workshop sockets.
• Carry Handle: Portable design with integrated handle for easy movement between vehicles.

7-Stage Charging Process

• Stage 1, Desulphation: Breaks down lead-sulphate crystals to restore battery capacity and performance.
• Stage 2, Soft Start: Gently introduces power to protect severely discharged batteries from shock.
• Stage 3, Bulk Charge: Charges at full 20A current to bring the battery to approximately 80% capacity.
• Stage 4, Absorption: Slows the charge rate to safely reach 100% without overheating or damaging cells.
• Stage 5, Battery Test: Automatically verifies battery health and successful charge completion.
• Stage 6, Recondition: Pulse repair for failed or deeply discharged batteries to restore performance.
• Stage 7, Float Maintenance: Maintains battery at full charge indefinitely without overcharging damage.

Charging Modes

• Car Mode (12V): Standard Lead-Acid, Wet, and Calcium batteries for everyday vehicles and bakkies.
• AGM/LiFePO4 Mode (12V/24V): Precision voltage profile for start-stop, AGM, and LiFePO4 batteries.
• Motorcycle Mode (12V): Lower amperage, gentle charging profile for small capacity motorcycle batteries.
• Repair Mode (12V/24V): Pulse recovery for sulphated and deeply discharged batteries with high internal resistance.

Technical Specifications

• Input Voltage: 100-240V AC, 50/60Hz
• Maximum Power: 300W
• Output: 12V 20A / 24V 10A
• Charging Stages: 7
• Supported Battery Capacity: 6Ah to 300Ah
• Minimum Start Voltage: 5.0V
• Thermal Protection: 65 degrees C, automatic shutdown
• Efficiency: ~85%
• Shell Material: PC Fireproof Construction
• Dimensions: 192 x 102 x 165mm
• Weight: 955g

Battery Chemistry Support

• Lead-Acid: Standard automotive batteries
• AGM: Start-stop and premium vehicle batteries
• LiFePO4: Lithium iron phosphate batteries
• Gel: Deep cycle and marine batteries
• EFB: Enhanced flooded batteries for newer start-stop systems
• Calcium: Maintenance-free automotive batteries

How to Use

• Step 1: Plug the charger into a standard 220V wall socket.
• Step 2: Select the correct charging mode for your battery type.
• Step 3: Connect the red clamp to the positive battery terminal and the black clamp to the negative terminal.
• Step 4: Charging begins automatically. The LCD display shows live progress.

For 24V charging, connect two 12V batteries in series before connecting the clamps.

What's in the box
1 x Smart Battery Charger 12V/24V 20A
1 x Built-in Power Cable
1 x Built-in Battery Clamp Cable