LiTime 2-Bank 12V/24V 10A Lithium Battery Charger Instruction Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your LiTime 2-Bank 12V/24V 10A Lithium Battery Charger. This smart charger is designed for 12.8V/25.6V LiFePO4 batteries and features adjustable voltage and an LED indicator. It is IP65 waterproof, making it suitable for marine, boat, and trolling motor applications.

Image 1.1: The LiTime 2-Bank 12V/24V 10A Lithium Battery Charger.

2. Safety Instructions

• Always read and understand this manual before operating the charger.
• Ensure the charger is compatible with your battery type (LiFePO4, NCM, Lead Acid) and voltage (12.8V/25.6V).
• Connect the charger to the battery terminals correctly: positive to positive, negative to negative. Reverse polarity can cause damage.
• Operate the charger in a stable, well-ventilated area.
• Do not disassemble the charger. Disassembly voids the warranty and may cause malfunction.
• Despite its IP65 rating, avoid immersing the charger in water or exposing it to high-pressure water sprays.
• Keep out of reach of children.

Image 2.1: Visual guide to important safety precautions, including matching battery voltage, ensuring tight terminals, checking polarity, proper placement, and avoiding disassembly.

3. Product Features

• Dual 10A Banks: Charges two batteries simultaneously, with 10A per bank.
• Multi-Battery Compatibility: Designed for LFP (LiFePO4), NCM, and Lead Acid batteries.
• Adjustable Voltage: Output voltages include 29.2V+14.6V for LFP, 29.4V+16.8V for NCM, and 29.4V+14.7V for Lead Acid.
• Advanced Safety Protections: Features over-temperature, over-current, reverse polarity, output short-circuit, and output over-voltage protection. CE, FCC, and RoHS certified.
• Battery Activation Function: Supports activating lithium batteries protected by their Battery Management System (BMS).
• IP65 Waterproof: Reliable for use in moist environments or when exposed to rain, equipped with waterproof connectors.
• M8 Terminal Upgrade: Enhanced connection between charger and battery for improved reliability.

Image 3.1: The charger features multiple safety protections including reverse connection, short circuit, over-temp, over-current, and under/over-voltage protection.

4. Package Contents

Upon opening your LiTime 2-Bank Battery Charger package, you should find the following items:

• 1x LiTime Dual Channel Battery Charger
• 1x User Manual
• Fastener Packs (for mounting)
• Fuses (15A)

Image 4.1: Contents of the LiTime 2-Bank Battery Charger package, including the charger, user manual, fastener packs, and fuses.

5. Setup

5.1 Installation Options

The LiTime 2-Bank Battery Charger offers flexible installation:

• Wall-mount: Use the provided fastener packs to securely mount the charger to a wall.
• Tabletop Placement: Simply place the charger on a stable, flat surface.

Image 5.1: The charger can be easily installed via wall-mount or tabletop placement.

5.2 Connecting the Charger

1. Connect the Battery: Attach the DC output cables (with M8 terminals) from the charger to your battery terminals. Ensure correct polarity (red to positive, black to negative).
2. Plug In: Connect the AC input cord to a standard 90V-260V AC power outlet.

Image 5.2: Steps for connecting the charger: first connect to the battery, then plug into an AC outlet.

6. Operating Instructions

6.1 Charging Process (3 Stages)

The LiTime charger utilizes a smart 3-stage charging process to optimize battery health and charging efficiency:

1. Pre-Charging Stage (T1): If the battery is deeply discharged, the charger sends a gentle stream of current to safely raise the voltage, protecting both the charger and battery from sudden stress.
2. Constant Current Charging Stage (T2): Once the battery voltage is stable, the charger delivers full, steady, and efficient current to rapidly charge the battery. This is where most of the energy flows into the battery.
3. Constant Voltage Charging Stage (T3): As the battery nears full capacity, the charger holds the voltage steady and slowly reduces the current. This precise topping-off ensures the battery cells are protected and fully absorbed.

Image 6.1: Diagram illustrating the three stages of the charging process: Pre-Charging, Constant Current, and Constant Voltage.

6.2 LED Indicator Status

The charger features an LED indicator to display its current status:

• Always on green: Battery is fully charged.
• Always on red: Battery is charging.
• Green Slow Flash: Charger is on standby.
• Red-green Slow Flash: Charging is stopped manually.
• Red-green Rapid Flash: Charger is in Set or Protection mode.

Image 6.2: Visual representation of the LED indicator and its corresponding charging status.

7. Maintenance

• Cleaning: Keep the charger clean and free from dust and debris. Use a dry cloth for cleaning.
• Storage: Store the charger in a cool, dry place when not in use.
• Environmental Protection: The IP65 rating provides protection against dust and water splashes. However, ensure the charger is not submerged or exposed to extreme conditions beyond its operating temperature range (-20°C to 40°C / -4°F to 104°F).
• Structural Integrity: The charger is built with a sturdy aluminum alloy structure designed for durability and efficient heat dissipation. Avoid dropping or subjecting it to heavy impacts.

Image 7.1: The charger features a sturdy aluminum alloy structure for durability and efficient heat dissipation.

8. Troubleshooting

8.1 Battery Not Working or Charging

If your 12V or 24V LiFePO4 battery is not working, won't charge, or shows a voltage below 9V (for 12V batteries) or 18V (for 24V batteries), it's likely the Battery Management System (BMS) has shut it down for protection. Follow these steps to attempt activation:

1. Disconnect Everything: Unplug the battery from all devices and the charger.
2. Rest: Leave the battery alone for 30 minutes. It may automatically recover to a normal voltage (>10V for 12V, >20V for 24V).
3. Recharge: If the voltage recovers, fully charge the battery as usual.

8.2 Advanced Activation Methods (If initial steps fail)

If the battery still doesn't work after resting and attempting a normal charge, try these methods:

• Method 1: Use a Charger with Activation Function: Connect the battery to a LiTime charger that explicitly supports lithium battery activation. This function can often wake up a protected battery.
• Method 2: Solar Controller Activation (for 12V batteries): On a sunny day, connect a 12V LiFePO4 solar charge controller to the battery and charge for 3-10 seconds to wake it up.

Note: For 24V batteries, double all voltage values mentioned (e.g., protection mode kicks in if voltage is below 18V, normal voltage is >20V). The same principle applies to 36V and 48V batteries, doubling or tripling the 12V thresholds accordingly.

9. Specifications

Image 9.1: Detailed dimensions of the LiTime 2-Bank Battery Charger.

10. Warranty and Support

LiTime is committed to providing reliable products and excellent customer service. Your LiTime 2-Bank 12V/24V 10A Lithium Battery Charger comes with a comprehensive warranty. For specific warranty details, please refer to the warranty card included in your package or visit the official LiTime website.

For any technical assistance, troubleshooting, or product inquiries, please contact LiTime customer support. We offer 24-hour prompt response and up to 5-year service for our products.

• Customer Service: Refer to your product packaging or the official LiTime website for contact information.
• Online Resources: Visit www.litime.com for FAQs, product updates, and additional support.