1. Product Overview
The OGRPHY 24V 100AH LiFePO4 Battery is a high-performance lithium iron phosphate battery designed for deep cycle applications. It features Grade A cells, offering a long lifespan of over 5000 cycles and a 10-year service life. This battery is an efficient replacement for traditional lead-acid batteries, providing significantly lighter weight, higher energy density, and superior cycle life. It includes an integrated 100A Battery Management System (BMS) for enhanced safety and performance.

Image 1.1: OGRPHY 24V 100AH LiFePO4 Battery showing its dimensions (20.5 x 9.4 x 8.5 inches) and weight (51.8 lbs), along with M8 terminal size (16mm).
Key Features:
- Grade A LiFePO4 Cells: Ensures high quality, reliability, and extended lifespan.
- Integrated 100A BMS: Provides protection against over-charge, over-discharge, overload, overheating, and short circuits.
- Lightweight Design: Approximately 1/3 the weight of comparable lead-acid batteries.
- High Efficiency: Over 90% energy efficiency with a low self-discharge rate (less than 3%).
- Wide Operating Temperature: Supports charging from -20℃ to 55℃ and discharging from 0℃ to 60℃.
- IP65 Waterproof Rating: Offers protection against dust and water splashes.

Image 1.2: Illustration of the internal LiFePO4 cells and the Battery Management System (BMS) protecting against over-charge, over-discharge, overload, overheating, and short circuits.
2. Setup and Installation
2.1 Unpacking and Inspection
Upon receiving your OGRPHY LiFePO4 battery, carefully unpack it and inspect for any visible damage. Ensure all components are present. If any damage or missing parts are found, contact customer support immediately.
2.2 Initial Charge
It is recommended to fully charge the battery before its first use. Use a compatible LiFePO4 charger (28.8V, 40Ah recommended for fast charging) or a solar panel system. Refer to the charging section for details.

Image 2.1: Charging options for the OGRPHY LiFePO4 battery. A 28.8V 40Ah LiFePO4 charger can fully charge the battery in 2.5 hours, while a 600W solar panel can do so in 4.5 hours.
2.3 Connection Guidelines
Connect the battery using appropriate M8 terminals. Ensure all connections are secure and properly insulated to prevent short circuits. Observe correct polarity: positive (+) to positive, negative (-) to negative.
Parallel Connection:
This 24V 100AH battery can be connected in parallel to increase capacity (e.g., for 200A, 300A, 400A applications). When connecting batteries in parallel, ensure all batteries are at a similar state of charge before connecting them. Use cables of equal length and gauge for optimal performance and balanced current distribution.
Series Connection:
While the product description mentions 48V applications, this specific model is 24V. For higher voltage systems, multiple 24V batteries can be connected in series. Consult a qualified technician for series connections to ensure proper voltage matching and system compatibility.

Image 2.2: An OGRPHY LiFePO4 battery, illustrating its robust design suitable for various connections.
3. Operation
3.1 Intended Applications
The OGRPHY 24V 100AH LiFePO4 battery is suitable for a wide range of deep cycle applications, including:
- Trolling Motors
- Solar Energy Storage Systems
- Recreational Vehicles (RVs)
- Golf Carts
- Marine Applications
- Off-Grid Power Systems

Image 3.1: The OGRPHY LiFePO4 battery in a trolling motor application, demonstrating its use in marine environments.

Image 3.2: The OGRPHY LiFePO4 battery integrated into an RV power system, providing reliable energy for recreational vehicles.
3.2 Charging and Discharging
Always use a charger specifically designed for LiFePO4 batteries. Avoid using chargers intended for lead-acid batteries unless they have a dedicated LiFePO4 mode. The recommended charging temperature range is -20℃ to 55℃. The recommended discharging temperature range is 0℃ to 60℃. The integrated BMS will manage charging and discharging parameters to protect the battery.
4. Maintenance
4.1 General Care
LiFePO4 batteries are largely maintenance-free. Keep the battery terminals clean and free from corrosion. Periodically check cable connections for tightness. Avoid physical damage to the battery casing.
4.2 Storage
For long-term storage, charge the battery to approximately 50% of its capacity. Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid storing the battery in temperatures below -20℃ or above 60℃. Recharge the battery every 3-6 months during long-term storage to prevent deep discharge.
4.3 Environmental Considerations
The battery has an IP65 waterproof rating, meaning it is protected against dust ingress and low-pressure water jets from any direction. However, it is not designed for submersion. Avoid exposing the battery to excessive moisture or corrosive environments.
5. Troubleshooting
If you encounter issues with your OGRPHY LiFePO4 battery, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Incorrect charger type; loose connections; BMS protection activated; charger malfunction. | Ensure a LiFePO4 compatible charger is used. Check all cable connections. Disconnect and reconnect the battery to reset BMS. Test charger with another device if possible. |
| Battery not discharging/no power output | BMS protection activated (over-discharge, over-current, short circuit); loose connections; load too high. | Check for short circuits or excessive load. Disconnect the load and try to charge the battery to reset BMS. Verify all connections are secure. Reduce load if it exceeds battery's continuous discharge current. |
| Reduced capacity or runtime | Battery not fully charged; aging; extreme operating temperatures. | Ensure battery is fully charged before use. Operate within recommended temperature ranges. If battery is old, its capacity may naturally decrease over time. |
| Battery overheating | Excessive charging/discharging current; poor ventilation; high ambient temperature. | Reduce charge/discharge current. Ensure adequate ventilation around the battery. Move battery to a cooler environment if ambient temperature is too high. The BMS will shut down the battery if it reaches critical temperatures. |
If these steps do not resolve the issue, please contact OGRPHY customer service for further assistance.
6. Product Specifications
| Feature | Detail |
|---|---|
| Model | 24V 100AH LiFePO4 Battery |
| Manufacturer Part Number | AF-7YLM-G6M5 |
| Nominal Voltage | 25.6 Volts (24V nominal system) |
| Nominal Capacity | 100 Ampere-hours (Ah) |
| Energy | 2560 Watt-hours (Wh) |
| Battery Cell Composition | Lithium Iron Phosphate (LiFePO4) |
| Integrated BMS | 100 Amps |
| Cycle Life | 5000+ cycles at 100% Depth of Discharge (DOD) |
| Service Life | Up to 10 years |
| Charging Temperature | -20℃ to 55℃ (-4°F to 131°F) |
| Discharging Temperature | 0℃ to 60℃ (32°F to 140°F) |
| Dimensions (L x W x H) | 20.5 x 9.4 x 8.5 inches |
| Item Weight | 48.5 pounds |
| Waterproof Rating | IP65 |
| Recommended Uses | RV, Trolling motor, Golf cart, Solar, Off-grid |
7. Warranty and Customer Support
7.1 Warranty Information
OGRPHY provides a 5-year quality warranty from the date of purchase for this LiFePO4 battery. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
7.2 Customer Service
For any questions, technical assistance, or warranty claims, please contact OGRPHY customer service. Our team is committed to responding within 24 hours to help resolve your issues. In cases where a problem cannot be resolved remotely, OGRPHY will provide a prepaid UPS label to facilitate the return of the battery for inspection or replacement.
Contact information can typically be found on the OGRPHY official website or through your purchase platform.

Image 7.1: OGRPHY brand logo, representing quality and customer commitment.