Deltran Battery Tender Instruction Manual

The Deltran Battery Tender is a microprocessor-controlled battery charger designed to safely charge and maintain 12V lead-acid batteries, including AGM, GEL, and WET types. It features multi-stage charging (initialization, bulk charge, absorption, float), reverse polarity protection, spark-proof connections, and automatic voltage detection. Below are key sections for safety, features, installation, operation, and troubleshooting.

Features at a Glance

Key components: Charger unit, Alligator clips, Ring terminal harness, AC power cord, Status indicator lights.

Installation & Setup

Unpack and inspect all components. Ensure charger is compatible with your 12V battery.

1. Choose connection method: Use alligator clips for temporary charging or ring terminals for permanent installation.
2. Connect to battery: RED clip/terminal to POSITIVE (+) battery post. BLACK clip/terminal to NEGATIVE (-) battery post or vehicle chassis ground.
3. Connect to AC power: Plug charger into a standard 120V AC, 60Hz outlet ONLY after battery connections are secure.
4. Verify location: Place charger on a stable, dry, non-flammable surface away from battery.

WARNING! Always connect clips to battery before plugging into AC power to prevent sparks. Ensure proper polarity to avoid damage.

First-Time Use

Follow these steps for initial charging cycle.

1. Ensure battery is in a well-ventilated area and terminals are clean.
2. Connect charger to battery as described in Installation.
3. Plug charger into AC outlet. Red LED should illuminate, indicating charging has begun.
4. Monitor LED: Red (charging), Green (charged/maintaining). Charging time varies by battery size and discharge level.
5. Once Green LED is solid, battery is fully charged and charger has entered Float/Maintenance mode.

CAUTION! Do not use with non-rechargeable batteries. Keep charger dry and away from flammable materials during operation.

Specifications

• Input Voltage: 120V AC, 60Hz.
• Output Voltage: 12V DC automatic.
• Charging Current: 0.75A (Battery Tender Junior) or 1.25A (Standard) depending on model.
• Battery Compatibility: 12V Lead-Acid, AGM, GEL, WET (Flooded).
• Charging Stages: 4-stage (Initialization, Bulk, Absorption, Float).
• Protections: Reverse polarity, short circuit, overcharge, thermal.
• Connectors: Alligator clips and ring terminal harness included.
• Indicators: Two-color LED (Red/Green).
• Operating Temperature: 32°F to 104°F (0°C to 40°C).
• Storage Temperature: -4°F to 122°F (-20°C to 50°C).

Controls and Indicators

Charger operation is automatic; status is indicated by LED lights.

LED Status Guide:

• Solid RED: Battery is charging (Bulk/Absorption stage).
• Flashing RED: Error condition (check connections, battery voltage).
• Solid GREEN: Battery is fully charged; charger is in Float/Maintenance mode.
• Flashing GREEN: Battery voltage is within Float range; charger is maintaining.
• OFF (No light): No AC power or charger not properly connected.

Note: No user controls are present; charging is fully automatic based on battery condition.

Charging Procedures

For routine charging of discharged or maintained batteries.

1. Preparation: Clean battery terminals if corroded. Ensure battery vent caps are secure (for flooded batteries).
2. Connection: Attach clips/terminals (RED to +, BLACK to -). Ensure firm contact.
3. Power On: Plug charger into AC outlet. Red LED should light immediately.
4. Monitoring: Charger will automatically progress through stages. No user intervention required.
5. Completion: When Green LED lights, charging is complete. Charger switches to Maintenance mode.
6. Disconnection: Unplug from AC outlet FIRST, then disconnect clips from battery.

Tip: For long-term storage, leave charger connected to maintain battery at optimal charge.

Maintenance Mode

Float mode maintains battery at full charge indefinitely.

• Once battery reaches full charge (Green LED solid), charger reduces voltage to a safe float level (approximately 13.2V-13.8V).
• Charger monitors battery and provides small pulses of current as needed to compensate for self-discharge.
• Battery can be left connected for months without risk of overcharging or damage.
• Ideal for seasonal vehicles (motorcycles, boats, RVs), lawn equipment, and backup batteries.

Note: Maintenance mode is automatic; simply leave charger connected after full charge is achieved.

Safety Features

Built-in protections ensure safe operation.

WARNING! Always use in a dry location. Do not cover charger during operation. Keep away from children and pets.

Care & Storage

Proper care ensures long charger life.

1. Cleaning: Unplug and disconnect from battery. Wipe exterior with dry cloth only. Do not use liquids or solvents.
2. Inspection: Periodically check cords and clips for damage (cracks, exposed wires). Replace if damaged.
3. Storage: Coil cords neatly. Store in a cool, dry place away from direct sunlight and moisture.
4. Connectors: Keep alligator clips and ring terminals clean; remove corrosion with wire brush if necessary.

CAUTION! Do not disassemble charger. No user-serviceable parts inside. Refer servicing to qualified personnel.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential use. Copyright © Deltran. All trademarks are property of Deltran Corporation. This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that it does not cause harmful interference. For support, visit www.batterytender.com or contact customer service at 1-800-531-2929.

Troubleshooting

Reset: Unplug from AC and battery for 2 minutes, then reconnect.

Service: 1-800-531-2929; www.batterytender.com