1. Introduction
This manual provides essential information for the safe and efficient use of your Mjbsan 12.8V 100Ah LiFePO4 Lithium Deep Cycle Battery. Please read this manual thoroughly before installation and operation to ensure optimal performance and longevity of your battery.
The Mjbsan 12.8V 100Ah LiFePO4 battery is designed for deep cycle applications, offering a long lifespan, high energy density, and robust safety features. It is suitable for various uses including RVs, solar systems, trolling motors, and off-grid power solutions.
2. Safety Information
WARNING: Failure to follow these safety instructions may result in fire, explosion, electric shock, or other hazards, causing serious injury or property damage.
- Do not short circuit the positive (+) and negative (-) terminals.
- Do not immerse, throw, or wet the battery in water.
- Do not disassemble, crush, or modify the battery.
- Ensure proper ventilation during charging and discharging.
- Use only compatible chargers designed for LiFePO4 batteries.
- Keep the battery away from heat sources, open flames, and flammable materials.
- Wear appropriate personal protective equipment (PPE) such as gloves and eye protection during installation and maintenance.
The Mjbsan LiFePO4 battery incorporates a Smart 100A Battery Management System (BMS) to protect against overcharging, over-discharging, short circuits, high temperature, and overcurrent conditions, enhancing overall safety.
Video: Overview of LiFePO4 battery technology and general applications. This video demonstrates the robust nature of LiFePO4 batteries, including safety features like resistance to fire and explosion under extreme conditions.
Video: ExpertPower Cell Testings. This video illustrates various safety tests performed on battery cells, including nail penetration, short circuit, and combustion tests, highlighting the inherent safety of LiFePO4 chemistry.
3. Product Overview
The Mjbsan 12.8V 100Ah LiFePO4 battery is a high-performance, lightweight, and long-lasting power solution. Key features include:
- Automotive Grade A Cells: Ensures stable performance and a low self-discharge rate.
- Integrated 100A Bluetooth BMS: Provides comprehensive protection and allows for real-time monitoring via a smartphone app.
- Universal BCI Group 24 Size: Compact design, 25% smaller than standard 100Ah LiFePO4 batteries, compatible with Group 24/27/31 battery boxes.
- Extended Lifespan: Up to 4000 cycles at 100% Depth of Discharge (DOD), 6000 cycles at 80% DOD, and 15000 cycles at 60% DOD, offering a 10-year lifespan.
- Lightweight Design: Weighs only 22 lbs, approximately 1/3 the weight of a comparable 12V 100Ah AGM battery.
- High Energy Density: Delivers 1280Wh of energy, equivalent to 2.5 times the energy of a 70A AGM battery of the same size.
What's in the Box:
- 1x Mjbsan 12V 100Ah LiFePO4 Battery
- 1x User Manual
Image: The Mjbsan 12.8V 100Ah LiFePO4 battery, showcasing its compact design, integrated handle, and a smartphone displaying the Bluetooth monitoring app.
Image: Detailed product dimensions (6.61in x 10.23in x 8.26in) and M8 terminal specifications (16mm length, 8mm diameter) for the Mjbsan 12.8V 100Ah LiFePO4 battery.
4. Setup and Installation
Before installation, ensure all connections are secure and correct to prevent damage to the battery or connected devices.
4.1 Terminal Connections
The battery features M8 terminals. Use appropriate M8 bolts and ensure connections are tight to prevent resistance and overheating. Always connect the positive (+) terminal to the positive lead and the negative (-) terminal to the negative lead of your system.
4.2 Capacity Expansion (Series and Parallel)
The Mjbsan 12.8V 100Ah LiFePO4 battery supports both series and parallel connections for increased capacity or voltage. It can be extended up to 4 batteries in series (Max 4S) and 4 batteries in parallel (Max 4P) to achieve a maximum capacity of 400Ah and higher voltages (24V, 36V, 48V).
- Parallel Connection: Connect positive to positive and negative to negative terminals to increase capacity while maintaining the same voltage (12V).
- Series Connection: Connect the positive terminal of one battery to the negative terminal of the next to increase the total voltage (e.g., two 12.8V batteries in series create a 25.6V system).
Important: When connecting batteries in series or parallel, ensure all batteries are of the same brand, model, and capacity, and are at a similar state of charge before connecting. Consult a qualified electrician if unsure.
Image: A visual guide demonstrating how to configure multiple batteries for parallel (12V) and series (up to 48V) connections, with a note about a maximum of 4 batteries in series.
5. Operating Instructions
The Mjbsan LiFePO4 battery is designed for ease of use and integrates smart features for optimal performance.
5.1 Bluetooth Monitoring
The built-in Bluetooth BMS allows you to monitor the battery's status in real-time via a dedicated smartphone application (compatible with Android and iOS). This includes voltage, current, temperature, state of charge (SOC), and individual cell voltages.
Video: Bluetooth 5.0 Connection and Battery Status Monitoring. This video demonstrates connecting a smartphone to the battery via Bluetooth and viewing real-time data such as charge/discharge status, voltage, temperature, and individual cell information.
5.2 Low-Temperature Cut-Off Protection
The integrated BMS includes low-temperature cut-off protection. This feature automatically stops discharging when the battery temperature drops below -4°F (-20°C) and stops charging when the temperature drops below 32°F (0°C). Charging resumes when the temperature reaches 41°F (5°C) or above. This protects the battery from damage in cold environments.
Image: Illustration of the battery's low-temperature cut-off protection, showing thresholds for stopping discharge (below -4°F), stopping charge (below 32°F), and resuming charge (at or above 41°F).
5.3 Applications
This battery is ideal for a wide range of applications:
- RV and Camper Power
- Solar Panel Systems
- Trolling Motors and Boats
- Off-Grid Systems
- Camping and Outdoor Power
- Golf Carts
Image: The Mjbsan 12V 100Ah LiFePO4 battery shown in an RV context, illustrating its capability to power devices like Bluetooth speakers, cell phones, mini-fridges, and coffee makers for extended durations.
Video: ExpertPower Solar Panel Kits. This video showcases various solar panel kit setups, from small to large, demonstrating how LiFePO4 batteries integrate into solar power systems for RVs and off-grid applications.
6. Charging Instructions
Proper charging is crucial for the lifespan and performance of your LiFePO4 battery. Always use a charger compatible with LiFePO4 chemistry.
Recommended Charging Methods:
- Generator + DC-DC Charger: Charging Voltage Setting: 29.2V.
- Solar Panel + Charge Controller: Charging Voltage Setting: 29.2V. Battery Mode Setting: 28.4V-29.2V LiFePO4.
- Dedicated LiFePO4 Charger: Charging Voltage Setting: 29.2V.
Note: Ensure your charger's output voltage and current are within the battery's specifications to avoid damage.
Image: Visual representation of three charging methods for the battery: using a generator with a DC-DC charger, a solar panel with a charge controller, and a standard battery charger, along with their respective charging voltage settings.
7. Maintenance
LiFePO4 batteries require minimal maintenance compared to lead-acid batteries, but following these guidelines will help maximize their lifespan:
- Regular Inspection: Periodically check battery terminals for corrosion or loose connections. Clean terminals as needed.
- Storage: If storing the battery for an extended period, ensure it is charged to approximately 50% State of Charge (SOC) and stored in a cool, dry place. Avoid extreme temperatures.
- Avoid Deep Discharge: While LiFePO4 batteries tolerate deep discharge well, consistently avoiding full discharge cycles can further extend their life. The BMS will protect against over-discharge.
- Temperature Management: Operate and store the battery within its specified temperature ranges. The built-in BMS provides protection against extreme temperatures.
8. Troubleshooting
If you encounter issues with your Mjbsan LiFePO4 battery, consider the following common troubleshooting steps:
- No Power Output: Check all cable connections for tightness and proper polarity. Verify the battery's state of charge using the Bluetooth app. The BMS may have activated a protection mode (e.g., low voltage, overcurrent).
- Battery Not Charging: Ensure the charger is compatible with LiFePO4 batteries and is properly connected. Check the charging voltage settings. The BMS may have activated overcharge or low-temperature protection.
- Unusual Odor or Swelling: Immediately disconnect the battery and contact customer support. Do not attempt to use or charge the battery.
- Bluetooth Connection Issues: Ensure the battery is within range of your device and the Bluetooth function is enabled on both the battery and your smartphone. Restart the app or your device if necessary.
For more complex issues or if troubleshooting steps do not resolve the problem, please contact Mjbsan customer support.
9. Specifications
| Specification | Value |
|---|---|
| Brand | Mjbsan |
| Model | MJLY260-MN |
| Voltage | 12.8 Volts |
| Battery Cell Composition | Lithium Iron Phosphate (LiFePO4) |
| Battery Capacity | 100 Amp Hours (Ah) |
| Energy | 1280 Wh |
| Amperage | 100 Amps (BMS) |
| Item Weight | 22 Pounds |
| Product Dimensions (D x W x H) | 6.61" x 10.23" x 8.26" |
| Terminal Type | M8 Terminal |
| Lifespan | Up to 10 Years / 4000+ Cycles |
| Max Series Connection | 4S (4 batteries in series) |
| Max Parallel Connection | 4P (4 batteries in parallel) |
10. Warranty and Support
For warranty information, technical support, or any questions regarding your Mjbsan 12.8V 100Ah LiFePO4 Lithium Deep Cycle Battery, please refer to the official Mjbsan website or contact their customer service directly. Details for contacting support are typically found on the product packaging or the manufacturer's official online presence.