Awake's electric surfboards and eFoils already ship with batteries, but for extended fun on the water, swapping in a freshly-charged cell is far more convenient than waiting on one to charge. The Flex XR is the brand's extended-range option, with the lithium-ion battery offering between 25 and 120 minutes of riding depending on the model, rider weight, and conditions. Compatible with the Rävik and Vigna ranges.