Additional Details ------------------------------ Product description: Energizer CR2016 replacement batteries for Cayeye, Sigma, Knog, Planet Bike and Mnay others. Card of 5. Replacement batteries for headlights, taillights and computers from most manufacturers. Sold as a card of 5. Energizer Lithium provides excellent low temperature performance at a 33% lighter weight than alkaline batteries. Sales unit: Card of 5