In the bowl of a food processor combine the dates and cashews. Process until they resemble coarse sand.
Add the coconut, zest and juice of the key limes, and maple syrup, and process until a dough forms. If the dough does not come together, add some water, 1 tablespoon at a time until the dough sticks together when you press it between your fingers.
Form 1" balls with your hands and roll them in some shredded coconut (if desired). Place on a parchment-lined plate. If you like the energy balls on the softer side, enjoy immediately. If you like them a bit more "firm", then freeze for at least 60 minutes and then enjoy.
Keep in a covered container in the freezer for best results, but they will also keep in the fridge.