Schumacher Battery Charger Manual SC1309

The Schumacher SC1309 is a fully automatic battery charger and maintainer designed for 6V and 12V lead-acid batteries, including standard, AGM, gel-cell, and deep-cycle batteries. It features microprocessor-controlled charging, automatic voltage detection, float-mode monitoring, and reverse hook-up protection. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Safety Instructions 3. Installation & Setup 4. Specifications 5. Controls and Indicators 6. Charging Procedure 7. Maintenance Mode 8. Care & Storage 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Microprocessor control unit, Charging clamps (red/black), AC power cord, LED status indicators, Battery type selector.

Feature	Description
Microprocessor Control	Automatically adjusts charge rate and maintains battery
Automatic Voltage Detection	Detects 6V or 12V battery automatically
Float-Mode Monitoring	Maintains optimal charge without overcharging
Reverse Polarity Protection	Alerts if clamps are connected incorrectly
Multi-Battery Support	Charges standard, AGM, gel-cell, and deep-cycle
LED Status Indicators	Shows charging, maintenance, and fault conditions
Fully Automatic Operation	No manual adjustment needed after connection
Compact Design	Lightweight and portable for easy storage

Safety Instructions

Read all instructions before use to prevent injury or damage.

Use in well-ventilated area away from sparks or flames.
Wear eye protection when working near batteries.
Do not charge frozen or damaged batteries.
Ensure charger is unplugged before connecting/disconnecting clamps.
Connect red clamp to positive (+) terminal first, then black to negative (-) or ground.

WARNING! Risk of explosive gases. Keep charger away from battery during charging. Do not smoke or use open flame near battery.

Installation & Setup

Unpack and inspect contents. Ensure charger is on stable, dry surface.

Select location: Dry, level surface with good ventilation.
Prepare battery: Clean terminals if corroded. Remove caps from flooded batteries (if applicable).
Connect charger: Plug AC cord into outlet AFTER connecting clamps to battery.
Verify connection: LED should illuminate indicating proper connection.

CAUTION! Do not connect to AC power before attaching to battery. Ensure clamps do not touch each other or metal surfaces.

Specifications

Model: SC1309
Input Voltage: 120V AC, 60Hz
Output Voltage: 6V/12V DC automatic detection
Charge Rate: 1.5A (maintain), 3A (charge)
Battery Types: Standard, AGM, Gel-Cell, Deep-Cycle (flooded)
Protections: Reverse polarity, short circuit, overcharge
Indicators: LED (Power, Charging, Maintenance, Fault)
Operating Temp: 32°F to 104°F (0°C to 40°C)
Dimensions: 7.5" x 3.5" x 2.5"
Weight: 2.2 lbs

Controls and Indicators

Front Panel: POWER LED (green), CHARGING LED (red), MAINTENANCE LED (green), FAULT LED (red).

LED Status Guide:

POWER (Green): AC power connected and ready.
CHARGING (Red): Actively charging battery.
MAINTENANCE (Green): Battery fully charged, maintaining optimal voltage.
FAULT (Red): Reverse polarity, bad battery, or improper connection.

Operation: Fully automatic - no user controls beyond connection.

Charging Procedure

Follow these steps for safe and effective charging.

Prepare: Turn off vehicle and all accessories. Ensure battery terminals are clean.
Connect: Attach RED clamp to positive (+) terminal. Attach BLACK clamp to negative (-) terminal or clean, unpainted metal ground.
Power: Plug AC cord into 120V outlet. POWER LED should illuminate green.
Monitor: CHARGING LED will glow red. Charger will automatically switch to MAINTENANCE mode (green) when complete.
Disconnect: Unplug AC cord first, then remove BLACK clamp, then RED clamp.

Tip: For deeply discharged batteries, charger may take several hours to reach full charge. If FAULT LED lights, check connections and battery condition.

Maintenance Mode

After full charge, charger enters float maintenance mode to prevent overcharging.

MAINTENANCE LED glows green.
Charger monitors battery voltage and provides small charge as needed.
Can be left connected indefinitely for seasonal storage.
Ideal for motorcycles, boats, RVs, and classic cars.

Note: For long-term storage, check battery and charger monthly for proper operation.

Care & Storage

Unplug and disconnect from battery before cleaning. Wipe with dry cloth only; do not use liquids or solvents.

Store in cool, dry place. Keep clamps clean and free of corrosion. Coil cord neatly to prevent damage.

CAUTION! Do not expose to rain or moisture. Do not store near heat sources or flammable materials.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL Listed. Copyright © Schumacher Electric Corporation. All trademarks are property of their respective owners. For support, visit www.schumacherelectric.com or contact 1-800-621-5485.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No LED indicators	No AC power	Check outlet; ensure cord is fully plugged in.
FAULT LED illuminated	Reverse connection or bad battery	Disconnect and reconnect clamps correctly. Test battery voltage.
CHARGING LED not on	Battery already charged or defective	Check battery voltage. If above 12.6V, battery may be charged.
Charger gets warm	Normal operation	Some warmth is normal during charging cycle.
Battery not holding charge	Old or defective battery	Test battery; may need replacement.
Clamps spark when connecting	Accessories on or poor connection	Ensure all vehicle accessories are off. Connect to clean terminals.

Reset: Unplug charger, disconnect clamps, wait 30 seconds, then reconnect following proper procedure.

Service: 1-800-621-5485; www.schumacherelectric.com