1. Introduction
The Battery Tender Plus 2 Bank Charging Station is designed to fully charge and maintain up to two 12V batteries simultaneously. It provides proper storage voltage without the damaging effects associated with trickle chargers. This smart charger is suitable for standard flooded, sealed maintenance-free, AGM, and Lithium LiFePO4 batteries.
Equipped with Integrated Smart Monitoring (ISM) technology, the charger adapts to the battery's needs hundreds of times per second to deliver the precise amount of charge. Key safety features include reverse polarity protection and spark-proof operation, ensuring safe and reliable use.
Image 1.1: The Battery Tender Plus 2 Bank Charger, showing the main unit and included alligator clips.
2. Important Safety Instructions
Please read and understand all safety instructions before operating the Battery Tender Plus 2 Bank Charger. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always read the battery manufacturer's specific precautions and recommended rates of charge before using the charger.
- Ensure the charging area is well-ventilated. Do not operate the charger in a confined area or restrict ventilation.
- Never smoke or allow a spark or flame in the vicinity of the battery or engine.
- Wear eye protection and protective clothing when working with batteries.
- Keep the charger out of reach of children.
- Disconnect the AC power cord from the outlet before making or breaking the DC output connections to the battery.
- Do not attempt to charge a frozen battery. Allow it to thaw before charging.
- Although this charger features reverse polarity protection and spark-proof operation, always ensure correct polarity (positive to positive, negative to negative) when connecting to a battery.
- Do not use the charger if the AC cord, DC cables, or connectors are damaged. Contact customer support for replacement.
3. Package Contents
Verify that all items are present in the package:
- 1 x Battery Tender Plus 2 Bank Charger (Model 022-0165-DL-WH)
- 2 x Sets of Alligator Clip Connectors
- 2 x Sets of Ring Terminal Connectors
4. Product Features
- Dual Independent Charging Stations: Two separate charging banks, each providing 12 volts / 1.25 amps, allowing simultaneous charging and maintenance of two batteries.
- Smart Charging Program: Features a 3-step charging program (Initialization, Bulk Charge, Float Mode) to optimize battery power without overcharging.
- Battery Type Compatibility: Designed for use with Standard (Flooded), AGM (Absorbed Glass Mat), and Lithium (LiFePO4) 12V batteries.
- LED Indicators: Solid state two-color LEDs clearly indicate the charging stage and selected battery type for each bank.
- Advanced Safety: Includes spark-proof connections and reverse polarity protection for enhanced user safety.
- Temperature Compensation: Ensures optimum charge voltage according to ambient temperature.
- Global Compatibility: Operates effectively worldwide.
5. Initial Setup
5.1. Unpacking and Inspection
Carefully remove the charger and all accessories from the packaging. Inspect the unit, cables, and connectors for any signs of damage. If any damage is found, do not use the charger and contact customer support.
5.2. Connecting to the Battery
The charger comes with two types of battery connectors: alligator clips and ring terminals. Choose the appropriate connector for your application.
- Alligator Clips: Ideal for temporary connections. Connect the red clip to the positive (+) battery terminal and the black clip to the negative (-) battery terminal.
- Ring Terminals: Suitable for semi-permanent installations. Attach the red ring terminal to the positive (+) battery post and the black ring terminal to the negative (-) battery post. Ensure connections are secure.
Repeat this process for the second battery if charging two simultaneously.
Image 5.1: Illustration of the alligator clips and ring terminal connectors.
Image 5.2: Proper connection of the charger to a battery terminal.
5.3. Connecting to AC Power
Once the DC connections to the battery are secure, plug the charger's AC power cord into a standard electrical outlet. The charger will automatically begin its diagnostic and charging process.
6. Operation Guide
6.1. Battery Type Selection
Each charging bank has a 'SELECT' button and indicator LEDs for different battery types: LITHIUM, AGM, and STD (Standard Flooded). Upon connecting to AC power, the charger defaults to the last selected battery type. To change the battery type:
- Press the 'SELECT' button for the desired bank.
- The corresponding LED (LITHIUM, AGM, or STD) will illuminate to indicate the active battery type.
- Ensure the selected battery type matches the battery connected to that bank.
Image 6.1: The charger displaying its LED indicators for battery type selection and charging status.
6.2. Charging Process
The Battery Tender Plus 2 Bank Charger utilizes a fully automatic 3-step charging program:
- Initialization: The charger performs a diagnostic check to ensure the battery is suitable for charging and determines its current state.
- Bulk Charge: The charger delivers a constant current until the battery reaches approximately 80% of its capacity. The 'CHARGING' LED will be illuminated.
- Float Mode (Maintenance): Once the battery is fully charged, the charger automatically switches to a float/maintenance mode. It supplies a small, precise current to maintain the battery at optimal storage voltage, preventing overcharging. The 'CHARGED' LED will be illuminated.
The charger can remain connected to the battery indefinitely without risk of overcharging, making it ideal for long-term maintenance.
Image 6.2: The charger actively maintaining two batteries.
6.3. Disconnecting the Charger
To disconnect the charger from the battery:
- Unplug the AC power cord from the electrical outlet.
- Disconnect the DC output connectors (alligator clips or ring terminals) from the battery terminals.
7. Care and Maintenance
- Cleaning: Keep the charger's casing clean and dry. Use a soft, dry cloth to wipe away dust or dirt. Do not use harsh chemicals or abrasive cleaners.
- Cable Inspection: Regularly inspect the AC power cord, DC output cables, and connectors for any signs of damage, fraying, or corrosion. Replace damaged components immediately.
- Storage: When not in use, store the charger in a cool, dry place, away from direct sunlight and extreme temperatures.
- Ventilation: Ensure the charger's ventilation slots are not blocked during operation or storage to prevent overheating.
8. Troubleshooting Guide
If you encounter issues with your Battery Tender Plus 2 Bank Charger, refer to the table below for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not turning on / No LEDs illuminated. | No AC power. | Check AC power cord connection. Ensure the wall outlet is functional by testing with another device. |
| 'CHARGING' LED not illuminating after connecting to battery. | Incorrect battery connection (reverse polarity). Battery voltage too low for detection. Faulty battery. | Verify positive (+) and negative (-) connections are correct. Disconnect and reconnect. Ensure battery voltage is above 3V for 12V batteries. If below, the charger may not initiate. Test the battery with a voltmeter. If severely discharged or damaged, it may need professional assessment or replacement. |
| Charger remains in 'CHARGING' mode indefinitely. | Battery is deeply discharged or faulty. | Allow more time for charging. If it persists for an unusually long period (e.g., over 24 hours for a small battery), the battery may be unable to accept a full charge. Consult a battery specialist. |
| Charger indicates 'CHARGED' but battery performance is poor. | Battery is old or damaged and cannot hold a charge. | The charger can only charge a battery to its maximum capacity. If the battery is old or damaged, it may not hold a charge effectively. Consider replacing the battery. |
9. Technical Specifications
| Feature | Specification |
|---|---|
| Manufacturer | Battery Tender |
| Model | 022-0165-DL-WH |
| Output Voltage | 12 Volts (DC) |
| Output Amperage | 1.25 Amps per bank (2.5 Amps total) |
| Compatible Battery Types | Standard (Flooded), AGM, Lithium (LiFePO4) |
| Charging Program | 3-Step (Initialization, Bulk Charge, Float Mode) |
| Product Dimensions (L x W x H) | 8.8" x 3.5" x 7" |
| Item Weight | 3.35 Pounds |
| AC Power Cord Length | 6 ft. - 18 AWG |
| DC Output Cord Length | 4.5 ft. - 18 AWG |
| Output Accessory Length | 1.5 ft |
| Safety Compliance | UL/CSA/CE/BC |
10. Warranty and Customer Support
10.1. Warranty Information
This Battery Tender product is covered by a 2-year limited warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
10.2. Customer Support
For technical assistance, troubleshooting, or to inquire about warranty service, please contact Battery Tender customer service. Visit the official Battery Tender website for the most current contact information and support resources.