1. Introduction
The ExpertPower 12V 35Ah Lithium Iron Phosphate (LiFePO4) Deep Cycle Rechargeable Battery is engineered for superior performance and longevity. Unlike traditional lead-acid batteries, LiFePO4 technology offers significant advantages including higher energy density, extended cycle life, lighter weight, and enhanced safety. This manual provides essential information for the safe and efficient use, installation, and maintenance of your ExpertPower LiFePO4 battery.
This battery is ideal for a wide range of deep cycle applications such as RVs, solar energy storage, marine vessels, overland adventures, and various off-grid power systems. It is equipped with an advanced Battery Management System (BMS) to ensure optimal performance and protection.
2. Safety Information
Please read and understand all safety warnings and instructions before operating or handling the battery. Failure to follow these instructions may result in serious injury, property damage, or voiding of the warranty.
- Risk of Fire or Explosion: Do not short circuit, disassemble, incinerate, or expose the battery to temperatures above 140°F (60°C).
- Avoid Mechanical Shock: Do not drop, puncture, or subject the battery to severe impacts.
- Charging: Only use a dedicated LiFePO4 battery charger. Do not use chargers designed for lead-acid batteries.
- Application: This battery is not a starting/jump-starting battery for vehicles or generators. It is not compatible with golf carts and ATVs.
- Ventilation: Ensure adequate ventilation when charging or operating the battery.
- Handling: Always wear appropriate personal protective equipment (PPE), such as safety glasses and gloves, when handling batteries.
- Disposal: Dispose of batteries according to local regulations. Do not dispose of in household waste.
Safety Test Demonstrations
The following video demonstrates the rigorous safety testing performed on ExpertPower LiFePO4 cells, including nail penetration, short circuit, combustion, drop, overdischarge, overcharge, crush, and impact tests, showcasing their inherent stability and resistance to extreme conditions.
Video: ExpertPower Cell Testings - Demonstrates battery safety under extreme conditions.
3. Product Overview
The ExpertPower 12V 35Ah LiFePO4 battery is designed for reliable and long-lasting power. Its compact form factor and robust construction make it suitable for various demanding applications.
Figure 3.1: ExpertPower 12V 35Ah LiFePO4 Deep Cycle Battery.
3.1. Key Features
- Lithium Iron Phosphate (LiFePO4) Chemistry: Offers superior safety, longer lifespan, and higher power density compared to traditional battery types.
- Built-in Battery Management System (BMS): Provides comprehensive protection against overcharge, deep discharge, overloading, overheating, low-temperatures, and short circuits, ensuring maximum useful life and safety.
- Long Cycle Life: Delivers 2500-7000 life cycles, significantly outperforming lead-acid batteries.
- Extended Lifetime: Designed for a 10-year expected lifetime.
- Lightweight Design: Approximately 1/3 the weight of comparable lead-acid batteries.
- Low Self-Discharge Rate: Retains charge for extended periods, losing only about 2% per month, allowing it to hold a charge for up to 1 year when stored.
Figure 3.2: Intelligent Battery Design highlighting the Industry Leading BMS and A+ Grade Cylindrical Cells.
Figure 3.3: Performance comparison showing ExpertPower LiFePO4 advantages in cycles, cost, weight, and lifetime.
3.2. Specifications
| Specification | Value |
|---|---|
| Nominal Voltage | 12.8V |
| Capacity | 35Ah |
| Energy | 448Wh |
| Charging Voltage | 14.4V |
| Standard Voltage | 13.8V |
| Max. Charging Current | 35A |
| Max. Continuous Discharge Current | 35A |
| Max. Surge Discharge Current | 70A (3 Seconds) |
| Terminal Type | M6 |
| Dimensions (D x W x H) | 5.19" x 7.75" x 5.19" |
| Weight | 10.6 lbs |
Figure 3.4: Detailed dimensions and M6 terminal specifications.
4. Setup and Installation
Proper setup is crucial for the safe and efficient operation of your ExpertPower LiFePO4 battery. Always ensure all connections are secure and correct polarity is observed.
4.1. Series and Parallel Connections
Your ExpertPower 12V 35Ah LiFePO4 battery supports both series and parallel connections for increased voltage or capacity, respectively. It can be expanded up to 4 batteries.
- Series Connection: Connect up to 4 batteries in series to achieve a 48V 35Ah system. This increases the total voltage while maintaining the same amperage.
- Parallel Connection: Connect up to 4 batteries in parallel to achieve a 12V 140Ah system. This increases the total amperage while maintaining the same voltage.
Figure 4.1: Series and Parallel Connection diagrams for multiple batteries.
Important: When connecting batteries in series or parallel, ensure all batteries are of the same brand, model, and capacity. It is recommended to fully charge each battery individually before making series or parallel connections.
4.2. Charging
A dedicated LiFePO4 charger is required for charging this battery. Do not use chargers designed for other battery chemistries (e.g., lead-acid), as this can damage the battery and pose a safety risk.
Figure 4.2: Charging options including solar charging and AC adapter.
5. Operating Instructions
Your ExpertPower LiFePO4 battery is designed for deep cycle applications, providing consistent power output throughout its discharge cycle.
5.1. General Usage
- Ensure all connections are tight and free from corrosion.
- Monitor battery voltage periodically, especially during prolonged use.
- Avoid exceeding the maximum continuous discharge current (35A) and surge discharge current (70A for 3 seconds) to prevent damage to the battery and BMS.
5.2. Applications
The versatility of LiFePO4 batteries makes them suitable for a wide array of uses. The following video highlights some common applications for ExpertPower LiFePO4 batteries.
Figure 5.1: Multipurpose applications for ExpertPower LiFePO4 batteries.
Video: ExpertPower - LiFePO4 Lithium Battery - Showcases various applications and benefits of LiFePO4 technology.
6. Maintenance and Storage
Proper maintenance and storage will maximize the lifespan and performance of your ExpertPower LiFePO4 battery.
6.1. Low Self-Discharge
One of the significant advantages of LiFePO4 batteries is their low self-discharge rate. This means less worry when stored, as the battery loses only about 2% charge per month. A fully charged LiFePO4 battery can potentially hold a charge for up to 1 year.
Figure 6.1: Low self-discharge rate of ExpertPower LiFePO4 battery.
6.2. Storage Guidelines
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- For long-term storage, it is recommended to store the battery at approximately 50% state of charge.
- Avoid storing the battery in a fully discharged state for extended periods, as this can lead to irreversible damage.
- Periodically check the battery's voltage during long-term storage and recharge if necessary.
7. Troubleshooting
This section addresses common issues you might encounter with your ExpertPower LiFePO4 battery. If you experience problems not listed here, please contact ExpertPower customer support.
7.1. Common Issues and Solutions
- Battery Not Charging:
- Ensure the charger is specifically designed for LiFePO4 batteries and is functioning correctly.
- Check all connections between the charger and the battery for proper contact and polarity.
- Verify that the power source for the charger is active.
- The BMS may have activated a protection mode (e.g., over-discharge). Try connecting to a compatible charger to reset the BMS.
- Low Voltage Output:
- The battery may be discharged. Recharge the battery fully.
- Check for loose or corroded connections at the battery terminals or within your system.
- Ensure the load is not exceeding the battery's maximum continuous discharge current.
- Battery Overheating:
- Immediately disconnect the battery from the load and charger.
- Allow the battery to cool down in a well-ventilated area.
- Check for short circuits in your system or excessive current draw.
- Ensure the ambient temperature is within the recommended operating range.
8. Warranty and Support
ExpertPower stands behind the quality and performance of its LiFePO4 batteries. Your purchase is backed by an unwavering warranty and access to world-class technical support.
For detailed warranty information, technical assistance, or any product-related inquiries, please visit the official ExpertPower website or contact their customer service team directly. Contact information can typically be found on the product packaging or the ExpertPower brand store on Amazon.
ExpertPower Store: Visit the ExpertPower Store on Amazon
