Compatible with the Espin Sport and Flow models. Keep riding with an extra battery for your Espin e-bike! Perfect for keeping on hand for long adventures!Note: the best way to prevent battery capacity deterioration is to bring the battery inside and allow it to warm up to room temperature before charging. Plugging a cold battery into the charger can permanently affect how much charge it can hold. It is normal for the battery to get warm while charging. To reduce heat, always leave the battery charging on a smooth, hard surface like wood, glass, tile, or concrete to keep it as cool as possible. When the bike is not in use for long periods, it’s recommended to top off the battery’s charge once a month to keep its charge capacity as high as possible.