1. Introduction
This manual provides essential information for the safe and efficient use of your LiTime 12V 50Ah LiFePO4 Battery. Please read this manual thoroughly before installation and operation to ensure optimal performance and longevity of your battery. This battery is designed for deep cycle applications such as trolling motors, marine vessels, RVs, solar systems, and off-grid power storage.
2. Product Overview and Features
The LiTime 12V 50Ah LiFePO4 battery incorporates advanced technology for reliable power delivery in various environments.
- Marine Excellence: Officially recognized by ABYC and ASA, featuring Grade A UL-tested, FCC/CE-certified cells.
- Robust Construction: IP65 waterproof and dustproof shell, built-in TVS for voltage spike protection, and enhanced shock resistance.
- Intelligent Bluetooth 5.0: Real-time monitoring of battery status via the LiTime App.
- High Energy Density: Utilizes automotive-grade lithium iron phosphate cells for stable performance and high power output.
- Advanced BMS: Integrated Battery Management System with low-temperature cut-off, preventing over-charging, over-discharging, over-current, and short-circuiting.
- Compact and Lightweight: Significantly smaller and lighter than traditional lead-acid batteries, ideal for space-constrained applications.
- Expandable System: Supports connection of up to 16 batteries (4P4S) to form systems up to 48V 200Ah.
Image 2.1: The LiTime 12V 50Ah LiFePO4 battery shown alongside a smartphone displaying the LiTime Bluetooth monitoring application interface.
Image 2.2: The LiTime battery highlighting its ABYC official membership and marine guarantee, indicating suitability for marine environments.
3. What's in the Box
Upon unpacking, please verify that all items listed below are present and undamaged:
- 1 * 12V 50Ah TM Bluetooth LiFePO4 Battery
- 2 * M8 - 5/8" (16MM) Terminal Bolts
- 2 * Insulating Caps for Bolts
- 1 * Product Manual (this document)
4. Safety Information
WARNING: Failure to follow these safety instructions may result in electric shock, fire, serious injury, or death.
- This battery is designed for energy storage applications and is not suitable for starting engines, golf carts, or jacks.
- Ensure proper ventilation when charging or discharging.
- Do not short-circuit the battery terminals.
- Do not expose the battery to fire or extreme heat.
- Do not disassemble, puncture, or modify the battery.
- Use only compatible LiFePO4 chargers.
- If OT terminals are attached directly with screws and their thickness is less than 2mm, add gaskets for lock attachment to prevent loosening and overheating.
- Keep out of reach of children.
5. Setup and Installation
5.1 Initial Activation
After first receiving the battery or if it has been switched off for an extended period, you need to activate it. Charge the battery using a lithium-activation charger or an MPPT charger to activate the Bluetooth function and ensure full functionality.
5.2 Terminal Connection
Connect your devices to the M8 terminals using the provided bolts and insulating caps. Ensure connections are secure to prevent arcing or overheating. If using thin OT terminals (less than 2mm thick), use appropriate gaskets to ensure a tight and safe connection.
5.3 Series and Parallel Connections
This battery supports connecting up to 16 batteries in a 4-series, 4-parallel (4P4S) configuration. This allows for creating systems up to 48V 200Ah, providing 10240Wh of energy and a maximum load power of 10240W. When connecting batteries in series or parallel, ensure all batteries are of the same voltage and capacity, and follow proper wiring diagrams to maintain balance and safety.
6. Operating Instructions
The LiTime 12V 50Ah LiFePO4 battery is ideal for powering trolling motors with 12V thrust up to 20-70 lbs, fish finders, and other marine or RV electronics.
- Discharge Rate: The maximum continuous discharge current is 1C (50A). It can sustain a maximum 1.2C (60A) continuous discharge for up to 30 minutes. Ensure your load does not exceed these limits.
- Low-Temperature Operation: The battery features low-temperature protection. Charging will automatically stop below 0°C/32°F and resume above 5°C/41°F. Discharging will stop below -20°C/-4°F.
Image 6.1: A fisherman operating a trolling motor on a boat, illustrating the battery's application for maximizing motor thrust.
Image 6.2: Diagram explaining the low-temperature cut-off protection: charging stops below 0°C/32°F, resumes above 5°C/41°F, and discharging stops below -20°C/-4°F.
7. Bluetooth App Usage
The integrated Bluetooth 5.0 allows for real-time monitoring of your battery's status via the LiTime App.
- Download the App: Scan the QR code on the battery or visit LiTime App Download to install the LiTime App on your smartphone.
- Connect: Ensure your battery is activated (see Section 5.1). Open the LiTime App; it will automatically detect and connect to your battery. No manual pairing is required.
- Monitor: View essential battery parameters such as State of Charge (SOC), voltage, current, capacity, and BMS status.
Image 7.1: A smartphone screen showing the LiTime app interface for battery monitoring, with QR codes for app download.
8. Charging Guidelines
Proper charging is crucial for the lifespan of your LiFePO4 battery. Always use a charger specifically designed for LiFePO4 batteries.
- Recommended Chargers: LiFePO4 battery chargers, MPPT solar charge controllers (for solar systems), generators (AC to DC chargers), and alternators (DC to DC chargers).
- Charge Rate:
- 0.2C (10A): Approximately 5 hours
- 0.5C (25A): Approximately 2 hours (Recommended)
- 1C (50A): Approximately 1 hour
- Low-Temperature Charging: The BMS will automatically prevent charging when the internal battery temperature is below 0°C (32°F) to protect the cells. Charging will resume once the temperature rises above 5°C (41°F).
Image 8.1: Illustrations of different charging methods for the LiTime LiFePO4 battery, including a dedicated LiFePO4 charger, solar panel with MPPT, generator, and alternator.
9. Maintenance
LiFePO4 batteries require minimal maintenance compared to lead-acid batteries, but following these guidelines will ensure maximum 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 storing in extreme temperatures.
- Cleaning: Keep the battery casing clean and free of dust and debris. Use a dry cloth for cleaning.
10. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not powering devices | Battery is discharged; BMS has activated protection (e.g., over-discharge, short-circuit). | Charge the battery. Check for short circuits or excessive load. The BMS has self-recovery for overload protection (after 30 seconds). |
| Bluetooth not connecting | Battery not activated; App issue. | Ensure the battery has been charged at least once with a lithium-activation charger or MPPT charger. Restart the app or phone. |
| Battery not charging in cold weather | Low-temperature cut-off protection activated. | Move the battery to a warmer environment (above 5°C/41°F) for charging. |
| Battery not discharging in very cold weather | Low-temperature discharge cut-off protection activated. | Move the battery to a warmer environment (above -20°C/-4°F) for discharging. |
11. Specifications
| Feature | Specification |
|---|---|
| Brand | LiTime |
| Model | 12V 50Ah TM |
| Product Dimensions | 6.54"D x 7.86"W x 6.67"H |
| Item Weight | 11.27 pounds |
| Number of Cells | 1 (internal cell pack) |
| Resistance | 40 Milliohms |
| Terminal Type | M8 |
| Automotive Fit Type | Universal Fit |
| Batteries Required | 1 Lithium Ion battery (included) |
| Low-Temp Charge Cut-off | 0°C / 32°F |
| Low-Temp Discharge Cut-off | -20°C / -4°F |
| Max Continuous Discharge | 1C (50A) |
| Max 30-min Continuous Discharge | 1.2C (60A) |
| Life Cycles | 4000+ cycles @ 100% DOD |
Image 11.1: Visual comparison showing the LiTime 12V 50Ah LiFePO4 battery weighing 11.27 lbs, significantly less than a 35.7 lbs lead-acid battery of similar capacity.
Image 11.2: Detailed size and weight comparison, illustrating the LiTime LiFePO4 battery's compact dimensions (L 7.68in, W 6.54in, H 6.77in) and lighter weight (11.27 lbs) compared to two lead-acid batteries.
12. Warranty and Support
LiTime is committed to providing high-quality products and excellent customer service.
- Service Period: The product comes with a 5-year service period, reflecting the expected lifespan of 10 years and 4000+ life cycles.
- Customer Support: LiTime offers phone support and online service with fast feedback within 24 hours. For advice on batteries or other trolling motor models, feel free to contact LiTime.
- Expertise: LiTime has over 10 years of expertise in RV and off-grid power solutions.
Image 12.1: Graphic illustrating the extended lifespan of LiFePO4 cells, showing 4000 cycles at 100% DOD, 6000 cycles at 80% DOD, and 15000 cycles at 60% DOD, along with a 5-year service period and 10-year lifespan.
