This is EVE 280K V2 version which is Max Charge 1C 280Ampere and Max discharge 1C 280Ampere. There are another EVE 280K V3 version which is Max 0.5C 140Ampere Charge and 0.5C 140Ampere discharge. V2 EVE280K with higher charge discharge rate. V3 EVE280K with lower C rate but 5% higher real capacity than V2 EVE 280K. Just order the version you need in your application. EVE 280K V2 Real capacity around 297Ah. EVE 280K V3 Real capacity around 310Ah. Same Prices 4pcs EVE 3.2V 280Ah Prismatic LiFePO4 cells with Free Ship by Sea 48-60 Days to door Grade A in same matched batch. New and no any bulging. With M6 Stud and easy to connect with bus bars. With sufficient capacity. Not cheaper and lower quanlity Grade B cells. This battery is widely used in electric vehicles, electric motorcycles, solar power, energy storage, etc.