If you're looking for a high-capacity and efficient energy storage solution, the Samsung INR18650-50E lithium-ion cell is an excellent choice. With a capacity of 4900mAh and a nominal voltage of 3.6V, this cell is capable of providing constant and reliable power for a wide range of applications, from consumer electronics to personal mobility electric systems. Additionally, it has a long lifespan more than 500 cycle with low lost of performance.