Schumacher Battery Charger Manual SC1307

The Schumacher SC1307 is a fully automatic battery charger and maintainer designed for 6V and 12V lead-acid batteries, including standard, AGM, and gel cell types. 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 selects optimal charge rate and maintains battery
Automatic Voltage Detection	Detects 6V or 12V battery automatically
Float Mode Monitoring	Maintains battery at full charge without overcharging
Reverse Polarity Protection	Alerts if clamps are connected incorrectly
Multi-Battery Support	Charges standard, AGM, and gel cell batteries
LED Status Indicators	Shows charging, maintaining, and fault conditions
Fully Automatic Operation	No manual adjustments needed after connection
Compact Design	Lightweight and portable for easy storage
Spark Proof Technology	Reduces risk of spark when connecting clamps
Overcharge Protection	Prevents damage to battery from excessive charging

Safety Instructions

Read all instructions before use. Contains risk of electric shock.

Use only with lead-acid batteries. Do not use with lithium-ion or dry cell batteries.
Work in well-ventilated area. Batteries generate explosive gases.
Wear eye protection and remove all jewelry when working with batteries.
Do not charge frozen or damaged batteries.
Keep charger dry. Do not expose to rain or moisture.

WARNING! Risk of explosion. Keep sparks, flames, and cigarettes away from battery. Connect and disconnect clamps carefully.

Installation & Setup

Prepare charger and battery for connection.

Select location: Place charger on stable, dry surface away from battery.
Prepare battery: Clean battery terminals if corroded. Remove vent caps if applicable.
Power connection: Plug AC cord into grounded 120V outlet. Do not connect to battery yet.
Battery connection: Connect RED clamp to positive (+) terminal first, then BLACK clamp to negative (-) terminal or chassis ground.
Verify connection: LED indicators should illuminate to show proper connection.

CAUTION! Always connect positive first, negative last. Reverse order when disconnecting.

Specifications

Model: SC1307
Input Voltage: 120V AC, 60Hz
Output Voltage: 6V/12V DC automatic selection
Charge Rate: 1.5A (trickle), 3A (standard)
Battery Types: Standard (Wet), AGM, Gel Cell
Battery Capacity: 30Ah to 120Ah (12V), 20Ah to 80Ah (6V)
Protection Features: Reverse polarity, short circuit, overcharge
LED Indicators: Power, Charging, Maintain, Fault
Cord Length: 3ft battery cables, 6ft AC cord
Dimensions: 7.5" x 3.5" x 2.5"
Weight: 2.2 lbs
Operating Temperature: 32°F to 104°F (0°C to 40°C)

Controls and Indicators

Front Panel: POWER switch, Battery Type selector (Standard/AGM/Gel), LED indicators.

LED Indicators:

POWER (Green): AC power is connected
CHARGING (Red): Battery is actively charging
MAINTAIN (Green): Battery is fully charged and in maintenance mode
FAULT (Red): Reverse connection, bad battery, or other error

Battery Type Selector: Set to match battery type for optimal charging: - STANDARD: For conventional flooded lead-acid batteries - AGM: For Absorbent Glass Mat batteries - GEL: For gel cell batteries

Charging Procedure

Automatic charging process for 6V and 12V batteries.

Verify battery voltage is between 1V and 18V. Batteries below 1V may not charge.
Set Battery Type selector to match your battery (Standard, AGM, or Gel).
Connect AC power to outlet. POWER LED should illuminate.
Connect clamps: RED to positive (+), BLACK to negative (-).
Charger automatically detects voltage and begins charging. CHARGING LED illuminates.
When battery reaches full charge, charger switches to maintain mode. MAINTAIN LED illuminates.
Disconnect in reverse order: Remove BLACK clamp first, then RED clamp.
Unplug AC cord from outlet.

Note: Charging time varies based on battery size and discharge level. A completely discharged battery may take 12-24 hours.

Maintenance Mode

Float mode maintains battery at optimal charge level for extended periods.

After full charge is reached, charger reduces to trickle charge (approximately 0.5A).
Maintains battery voltage without overcharging.
Suitable for seasonal vehicles, boats, RVs, and equipment in storage.
Can be left connected for months without damaging battery.
MAINTAIN LED remains lit while in maintenance mode.

WARNING! While maintenance mode is safe for extended use, periodically check battery and connections.

Care & Storage

Proper maintenance ensures long charger life.

Keep charger clean and dry. Wipe with dry cloth if dirty.
Store in cool, dry place away from direct sunlight.
Coil cords neatly to prevent damage to wires.
Inspect clamps regularly for corrosion or damage.
Check AC cord for cuts or fraying before each use.

CAUTION! Do not immerse in water or use in wet conditions. Do not store with clamps connected to battery.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL listed. Copyright © Schumacher Electric Corporation. All rights reserved. For technical 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 AC cord is fully plugged in; try different outlet.
FAULT LED illuminated	Reverse connection or bad battery	Disconnect clamps; verify polarity; check battery voltage (should be 1V+).
CHARGING LED not lit	Battery fully charged or connection issue	Check clamp connections; battery may be fully charged (check MAINTAIN LED).
Battery not holding charge	Old or damaged battery	Test battery with load tester; battery may need replacement.
Charger gets warm	Normal during charging	Some warmth is normal; if excessively hot, disconnect and contact service.
Spark when connecting	Normal small spark possible	Ensure charger is plugged into AC first to minimize spark; connect positive first.

Reset: Disconnect from battery and AC power for 30 seconds to reset microprocessor.

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