The Samsung 40T 21700 4000mAh 30A Battery are a new flat-topped 21700 battery cell fom the revered brand Samsung, ideal for powering high amp box mod and other high-drain devices.Price shown is for one battery only.Samsung 40T 21700 4000mAh 30A Batteries Features: Nominal Capacity – 4000mAh Continuous Discharge Current – 30A Nominal Voltage: 3.6V Maximum Voltage: 4.2V Top: Flat Top...