Schumacher 10/2 Amp Battery Charger Manual

The Schumacher 10/2 Amp Battery Charger is a versatile, multi-rate charger designed for charging and maintaining 6-volt and 12-volt lead-acid batteries, including standard, AGM, and gel cell types. It features a 10-amp fast charge and a 2-amp slow/trickle charge setting, automatic voltage detection, microprocessor control, reverse hook-up protection, and a digital display. 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 Procedures 7. Maintenance Mode 8. Care & Storage 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Charger unit with digital display, Charge Rate selector switch, Battery Clamps (red/black), AC power cord, and reverse polarity protection circuit.

Feature	Description
Charge Rate Selector	Switch between 10A (Fast Charge) and 2A (Slow/Trickle Charge)
Digital Display	Shows battery voltage, charge status, and error codes
Automatic Voltage Detection	Detects 6V or 12V battery automatically
Microprocessor Control	Monitors and adjusts charge to prevent overcharging
Reverse Hook-up Protection	Prevents damage if clamps are connected incorrectly
Maintenance Mode	Automatically switches to float mode after full charge
Battery Type Compatibility	Standard, AGM, Gel Cell (maintenance-free)
LED Indicators	Power, Charging, Complete, Fault
Cooling Fan	Thermally controlled for quiet operation
Carrying Handle	Integrated for easy transport

Safety Instructions

Read all instructions before use. Charger produces hydrogen gas—keep away from flames/sparks.

Use in well-ventilated area. Do not cover charger during operation.
Wear eye protection. Avoid touching eyes after handling battery acid.
Do not charge frozen or damaged batteries.
Disconnect AC power before connecting/disconnecting battery clamps.
Connect positive (red) clamp to positive battery terminal first.

WARNING! Risk of explosive gases. Battery acid can cause severe burns. Keep out of reach of children.

Installation & Setup

Unpack and inspect contents. Ensure area is dry and well-ventilated.

Place charger on stable, non-flammable surface near battery.
Verify battery voltage (6V or 12V). Charger will auto-detect.
Set Charge Rate: 10A for faster charge, 2A for small batteries or maintenance.
Connect AC power cord to grounded 120V outlet.
Connect clamps: RED to positive (+), BLACK to negative (-) terminal.
Monitor digital display for status.

CAUTION! Never connect clamps to each other. Ensure firm clamp connection to terminals.

Specifications

Model: Schumacher 10/2 Amp Battery Charger
Input Voltage: 120V AC, 60Hz
Output Voltage: 6V DC / 12V DC (auto-select)
Charge Rates: 10 Amps (fast), 2 Amps (slow/trickle)
Battery Compatibility: 6V and 12V lead-acid, including AGM and Gel Cell
Display: Digital LCD (voltage, status, error codes)
Protections: Reverse polarity, short circuit, overheat
Cooling: Thermally controlled fan
Dimensions: Approx. 10" L x 7" W x 4" H
Weight: Approx. 5 lbs

Controls and Indicators

Front Panel: Digital Display, Charge Rate Switch (10A/2A), Power Button, LED Indicators.

Digital Display Codes: "6V" or "12V" (detected voltage), "CHG" (charging), "FUL" (fully charged), "ERR" (error).

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

Charge Rate Switch: Select 10A for standard charging (car, truck, SUV batteries). Select 2A for small batteries (motorcycle, lawn mower) or long-term maintenance.

Charging Procedures

Follow steps for safe and effective charging.

Ensure battery terminals are clean and free of corrosion.
Set Charge Rate switch to desired amperage (10A or 2A).
Plug AC cord into outlet. POWER LED illuminates.
Connect clamps: RED to positive (+), BLACK to negative (-).
Display will show detected voltage and "CHG". CHARGING LED flashes.
Charger automatically switches to maintenance mode when full ("FUL" display, COMPLETE LED solid).
To disconnect: Unplug AC power, then remove BLACK clamp first, then RED.

Tip: For deeply discharged batteries, 2A setting may be required to initiate charge.

Maintenance Mode

After full charge, charger automatically enters float/maintenance mode to keep battery at optimal voltage without overcharging.

Display shows "FUL". COMPLETE LED is solid green.
Charger maintains battery indefinitely when left connected.
Ideal for seasonal vehicles or stored batteries.

Note: For long-term storage, check battery and charger periodically.

Care & Storage

Unplug and clean after each use. Store in cool, dry place.

Wipe exterior with dry cloth. Do not use liquids or solvents.
Inspect clamps and cords for damage before storage.
Coil cords loosely; avoid sharp bends.
Store in original box or protective case if available.

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

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 technical support, visit www.schumacherelectric.com or contact 1-800-621-5485.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power (LEDs off)	AC outlet dead / cord not connected	Check outlet with another device; ensure cord is fully plugged in.
Display shows "ERR"	Reverse polarity / bad connection	Disconnect clamps, verify correct polarity, reconnect securely.
Charger not detecting voltage	Battery deeply discharged / faulty	Try 2A setting; if no change, battery may need replacement.
Fan not running	Thermal control / obstruction	Ensure vents are clear; fan runs when internal temperature rises.
Battery not holding charge	Battery old / sulfated	Test battery with load tester; may require replacement.

Reset: Unplug AC power, disconnect clamps, wait 30 seconds, then restart.

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