Schumacher Battery Charger SC1305 Manual

The Schumacher SC1305 is a fully automatic battery charger and maintainer designed for 6V and 12V lead-acid batteries, including standard, AGM, gel-cell, and deep-cycle types. It features microprocessor-controlled charging, automatic voltage detection, multi-stage charging (bulk, absorption, float/maintenance), reverse hook-up protection, spark-proof technology, and a digital display showing voltage, amperage, and charge status. Below are key sections for safety, features, operation, and troubleshooting.

Features at a Glance

Key components: Microprocessor control unit, Digital LCD display, Charging clamps (red/black), AC power cord, Mode selection buttons.

Safety Instructions

Read all instructions before use. Charger contains electrical parts that can cause shock or fire.

1. Use in dry, well-ventilated area away from flammable materials.
2. Do not expose to rain or moisture.
3. Connect to grounded 120V AC outlet only.
4. Wear eye protection when working near batteries.
5. Do not charge frozen or damaged batteries.
6. Keep children and pets away during operation.

WARNING! Risk of explosive gases. Battery charging produces hydrogen gas. Keep sparks, flames, and smoking away from battery area.

Installation & Setup

Unpack charger and inspect for damage. Ensure all parts are included.

1. Place charger on stable, non-flammable surface near battery.
2. Plug AC cord into grounded 120V outlet (do not turn on yet).
3. For in-vehicle charging: Turn off ignition and all electrical loads.
4. For bench charging: Remove battery from vehicle if possible.
5. Clean battery terminals before connection.

CAUTION! Never connect charger to AC power before connecting to battery. Always connect clamps to battery first.

Specifications

• Model: SC1305
• Input Voltage: 120V AC, 60Hz
• Output Voltage: 6V/12V DC automatic selection
• Charge Rate: 1.5A (trickle), 10A (normal), 30A (engine start assist)
• Battery Types: Standard (flooded), AGM, Gel-Cell, Deep-Cycle
• Display: Digital LCD (voltage, amps, status icons)
• Protections: Reverse polarity, short circuit, overheat, overcharge
• Dimensions: 9.5" x 6.5" x 3.2"
• Weight: 4.2 lbs
• Compliance: UL, cUL listed

Controls and Indicators

Front Panel: POWER button, MODE button, Digital Display, Status LEDs.

Display Icons: Battery % (0-100%), Voltage (V), Current (A), Charging Stage (BULK/ABSORPTION/FLOAT), Error Codes.

Buttons: POWER - Turns charger on/off. MODE - Cycles between CHARGE (normal), MAINTAIN (float), and RECONDITION (recovery) modes.

LED Indicators: POWER (green), CHARGING (flashing amber), COMPLETE (solid green), FAULT (red).

Charging Procedure

Follow these steps for safe, effective charging:

1. Ensure charger is unplugged from AC outlet.
2. Connect red clamp (+) to battery positive terminal.
3. Connect black clamp (-) to battery negative terminal or vehicle chassis ground.
4. Plug AC cord into wall outlet.
5. Press POWER button; charger will automatically detect battery voltage.
6. Display will show battery voltage and begin charging automatically.
7. Charger progresses through stages: BULK (constant current), ABSORPTION (constant voltage), FLOAT (maintenance).
8. When fully charged, display shows "FULL" or "100%" and COMPLETE LED lights.
9. To disconnect: Unplug AC cord first, then remove black clamp, then red clamp.

Tip: For deeply discharged batteries (<2V), charger may enter recovery mode automatically.

Maintenance Mode

After full charge, charger automatically switches to Float/Maintenance mode to keep battery at optimal charge indefinitely without overcharging.

1. In Maintenance mode, charger monitors voltage and provides small pulses as needed.
2. Display shows "FLOAT" or "MAINT" with battery percentage.
3. Ideal for seasonal vehicles, boats, RVs, or stored equipment.
4. Can be left connected for months safely.

Note: For long-term storage, ensure battery is in ventilated area and terminals are clean.

Error Codes & Diagnostics

If error occurs, display shows code and FAULT LED lights.

Care & Storage

Unplug and disconnect from battery before cleaning. Wipe with dry cloth only.

1. Store in dry, cool location away from direct sunlight.
2. Keep clamps clean; wipe with baking soda solution if corroded, then dry thoroughly.
3. Coil cords neatly to prevent damage.
4. Do not store with clamps connected to battery.

CAUTION! Never immerse in water or use chemical cleaners. Do not expose to temperatures above 140°F (60°C).

Warranty Information

Schumacher Electric Corporation provides a limited warranty for this product. Warranty period: 2 years from date of purchase. Proof of purchase required. Warranty covers defects in materials and workmanship under normal use. Not covered: Damage from misuse, accident, improper installation, commercial use, or unauthorized repair. For warranty service, contact Schumacher Customer Service with model number and purchase receipt.

Troubleshooting

Reset: Unplug from AC and battery for 2 minutes to reset microprocessor.

Customer Support: 1-800-621-5485; www.schumacherelectric.com