LITHIUM-FERROPHOSPHATE-BASED ENERGY STORAGE SYSTEMS: TEST RESULTS OF A 120Ah LIFEPO4 BATTERY In the pursuit of eco-friendly and sustainable energy storage solutions, Lithium-Iron-Phosphate (LiFePO4) batteries have emerged as a reliable and efficient alternative to traditional battery technologies. As the demand for these batteries continues to rise, thorough testing and evaluation of their performance has become increasingly essential. This comprehensive review captures the results of an exhaustive test of a 120Ah LIFEPO4 battery, conducted to assess its performance, capacity, and reliability. The scope of this assessment encompasses various aspects of the battery's functionality, including its charging and discharging behavior, capacity retention, and thermal characteristics. Results indicate that the battery exhibits excellent performance, demonstrating a stunning 80% capacity retention rate after 600 charge/discharge cycles. Furthermore, the device's thermal management system ensures optimal operating temperatures, preventing overheating and prolonging the battery's lifespan. The test results also demonstrate the battery's resilience, showcasing an impressive 95% capacity retention rate after exposure to extreme ambient temperatures. Additionally, the apparatus's high-energy density and lightweight design make it an attractive option for a wide range of applications, from portable electronics to renewable energy systems. As a comprehensive review of a 120Ah LIFEPO4 battery's performance and durability, this assessment serves as a valuable resource for industry professionals, researchers, and eco-conscious consumers seeking reliable and sustainable energy storage solutions.