Samsung INR21700-50S is a high-end Li-ion battery with a capacity of 5000mAh and a load capacity of up to 35A. Its large capacity and 72g weight make it one of the best batteries on the market.
Be sure to store the battery in a dedicated box, especially during transport. If you do not use the battery for a period of time, make sure that its voltage is greater than 2.5 volts