KEPWORTH 12.8V 135Ah LiFePO4 Battery User Manual

1. Introduction

Thank you for choosing the KEPWORTH 12.8V 135Ah LiFePO4 Deep Cycle Battery. This manual provides essential information for the safe and efficient use of your battery. Designed with Grade A Lithium Iron Phosphate Cells, this battery offers over 4000 deep cycles, making it ideal for various applications including trolling motors, boats, RVs, solar systems, and off-grid setups. It features an upgraded smart Battery Management System (BMS) for enhanced protection and real-time monitoring via a mobile application.

Figure 1.1: KEPWORTH 12.8V 135Ah LiFePO4 Battery with Bluetooth monitoring capability.

2. Safety Information

Please read and understand all safety instructions before operating the battery. Failure to follow these instructions may result in electric shock, fire, serious injury, or property damage.

• Do not short-circuit the battery terminals.
• Do not expose the battery to fire, heat, or direct sunlight.
• Do not immerse the battery in water or other liquids.
• Do not disassemble, puncture, or modify the battery.
• Use only compatible chargers designed for LiFePO4 batteries.
• Keep the battery away from children and pets.
• Ensure proper ventilation when charging or discharging.
• Wear appropriate personal protective equipment (PPE) such as gloves and eye protection when handling the battery.

3. Product Overview

The KEPWORTH 12.8V 135Ah LiFePO4 battery is a high-performance, long-lasting power solution. Key features include:

• Grade A LiFePO4 Cells: Ensures higher energy density, stable performance, and greater power.
• Smart 100A BMS: Built-in Battery Management System provides comprehensive protection against over-charging, over-discharging, over-current, short-circuit, high temperature, and low temperature.
• Bluetooth Connectivity: Monitor battery information in real-time via a dedicated mobile application.
• Long Cycle Life: Rated for 4000+ deep cycles, offering a 10-year lifetime.

Figure 3.1: Battery dimensions (L13.07*W6.93*H8.66 inches) and M8 terminal specifications.

Figure 3.2: Internal structure highlighting the 100A Smart BMS and its protective features.

Figure 3.3: Smart function via mobile application for real-time battery monitoring.

4. Setup

4.1 Initial Connection

Before connecting the battery, ensure all loads are disconnected. Connect the positive terminal of the battery to the positive terminal of your system and the negative terminal to the negative terminal. Ensure connections are secure and tight to prevent arcing and overheating.

4.2 Parallel and Series Connection

This 12.8V 135Ah LiFePO4 battery supports both parallel and series connections for capacity and voltage expansion, respectively.

• Parallel Connection: There is no limit to the number of batteries that can be connected in parallel to increase total capacity (Ah) while maintaining 12.8V. Ensure all batteries are at a similar state of charge before connecting in parallel.
• Series Connection: This battery supports series connection. However, for optimal performance and safety in series configurations (e.g., 24V, 36V, 48V systems), it is recommended to use KEPWORTH batteries specifically designed for higher voltage systems. If connecting in series, ensure all batteries are of the same model, capacity, and age, and are fully balanced before connection.

Figure 4.1: The KEPWORTH LiFePO4 battery can serve as a direct replacement for traditional lead-acid batteries.

5. Operating

5.1 Charging Recommendations

For optimal performance and longevity, adhere to the following charging guidelines:

• Recommended Charging Voltage: 14.6V.
• Recommended Charging Current: 20A-50A.
• Compatible Chargers: Use a 14.6V LiFePO4 charger. Solar panels (recommended >300W), generators/alternators, and inverters with charging functions can also be used, provided they are compatible with LiFePO4 charging profiles.

Figure 5.1: Various recommended charging methods for the KEPWORTH LiFePO4 battery.

5.2 Low-Temperature Protection

The smart BMS includes a low-temperature cut-off function to ensure safe operation in cold environments:

• Stop Discharging: Below -4°F (-20°C).
• Stop Charging: Below 32°F (0°C).
• Resume Charging: At or above 41°F (5°C).

Figure 5.2: Low-temperature cut-off protection ensures battery safety in cold conditions.

5.3 Typical Applications

This battery is versatile and suitable for a wide range of deep cycle applications:

• Trolling Motors & Boats
• Recreational Vehicles (RVs) & Campers
• Solar Energy Storage Systems
• Off-Grid Power Solutions
• Backup Power Systems

Figure 5.3: The compact size and high capacity of the battery enable diverse applications.

6. Maintenance

Proper maintenance ensures the longevity and performance of your KEPWORTH LiFePO4 battery.

• Regular Inspection: Periodically check battery terminals for corrosion or loose connections. Clean as necessary.
• Charge Level: Avoid prolonged storage at a fully discharged state. For long-term storage, charge the battery to approximately 50% of its capacity.
• Storage Environment: Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
• Cleaning: Use a dry cloth to wipe the battery casing. Do not use solvents or abrasive cleaners.

7. Troubleshooting

If you encounter issues with your KEPWORTH battery, refer to the following common problems and solutions:

If the problem persists after attempting these solutions, please contact KEPWORTH customer support.

8. Specifications

9. Warranty and Support

KEPWORTH is committed to providing satisfactory service and high-quality products.

• Warranty: This 12.8V 135Ah Lithium battery comes with a 5-Year Warranty.
• Customer Support: For any questions regarding delivery, battery performance, or other issues, please contact KEPWORTH customer service. You can typically find contact options on the platform where you purchased the product (e.g., "Contact Seller" on Amazon's "Your Order" page or via the KEPWORTH storefront). A proper solution will be provided within 24 hours.