Ultra Logic 12V 3–25A

Overview

The Ultra Logic Battery Charger 12V 3 to 25A is a fully automatic, self-controlled CC/CV smart SMPS battery charger that provides efficient and safe charging by automatically detecting and optimizing charging parameters based on the connected battery.

It incorporates advanced self-controlling parameters and an LCD display, ensuring safety and performance alongside easy, plug-and-play operation.

Product Overview

• ON/OFF power switch
• Charging selection potentiometer – 1 to 6 stages
• Display shows total charging time (hours and minutes), voltage, battery number and ampere at one go
• RED cable to the battery positive (+) terminal
• BLACK cable to the battery negative (−) terminal
• Mains & Reverse Battery LED indicators

Key Features

• Automatic Cut-OffAutomatically stops charging once the battery reaches full capacity to prevent overcharging and preserve battery health.
• Charging Mode (3 to 25 A)A physical potentiometer lets you manually select the charging current based on your battery's capacity.
• Powerful OutputA robust output of 3 to 25 amperes for an efficient and stable charging cycle.
• Fully Automatic OperationIntelligently detects and optimizes charging parameters without manual intervention.
• Smart LCD DisplayReal-time monitoring of charging time, current charging status, number of batteries, battery voltage status and self-control mode status.
• Reverse Polarity ProtectionA dedicated LED indicator glows during incorrect connections, protecting both the charger and the battery.
• Copper Coil TransformerPowerful copper coil transformer.
• Robust DesignSide ventilation and a cooling fan for optimal heat dissipation, ensuring long life and reliable performance.

Technical Specifications

Recommended Charging Selection – One Battery

Smart Full-Charge Detection

When the battery is charged to 14.5V (or 90%), the software starts its full-charge check: instead of voltage and amperage, the screen shows S _ _ _ / S * _ _ / S * * _ / S * * * / FUL. Each software stage performs a 3-minute check, and when all three stages confirm the battery is fully charged, “FUL” is displayed and the charger automatically stops charging.

Operating Instructions (Plug & Play)

1. PreparationEnsure the charger is turned off and unplugged from the AC mains. Clean the battery terminals if necessary.
2. Select charging modeUse the potentiometer to select a 3 to 25 A charging mode based on your battery capacity.
3. Connect the batteryTightly connect the charger leads to the battery terminals.
4. Power onPlug the unit into a standard AC outlet. The Mains LED will light and the LCD will show real-time charging parameters.
5. Charging processThe charger automatically monitors the battery and stops charging when charging is complete (automatic cut-off).

Note: If the Reverse Battery LED lights up, immediately disconnect the clamp and correct the polarity (positive to positive, negative to negative).

Important Safety Instructions

• Never ignore the Reverse Battery LED. Always ensure a correct connection.
• Do not block the side ventilation slots; clear airflow is essential for heat dissipation and long service life.
• Only charge 12V lead-acid and tubular batteries in the 30 Ah to 250 Ah+ range. Do not attempt to charge non-rechargeable or defective batteries.
• Avoid exposing the charger to rain, moisture or extreme direct heat. Operate in a dry, well-ventilated area.

Ideal Applications

• AutomotiveCar and SUV batteries
• Inverter SystemsHome or office backup batteries
• Solar Power SystemsSolar storage batteries
• Heavy MachineryTractor and commercial truck batteries
• Commercial SpacesWorkshops and professional automotive service centres

Highlights Across All Models

• Auto cut-off technologyOnce the battery is fully charged, the device automatically stops charging, preventing overcharging.
• Multi-stage charging (Boost and Float)When the battery level is low, it charges rapidly in boost mode. As the battery nears full charge, it shifts to float mode, which helps preserve the battery's lifespan.
• Comprehensive protectionBuilt-in safety features protect against short circuits, overloads, excessive temperatures and reverse polarity (incorrect wiring).
• High efficiencyReduces power consumption and provides a stable output even at low voltage (e.g. 150V AC).
• Copper construction100% copper transformers, and all types of cables/wires.