The Shimano Steps E8004 Battery Charger and Power Cable is a compact and efficient charging solution for your electric bike. With rapid charging capabilities, this charger can quickly charge your battery from half to 80% in just 1 hour, or from empty to fully charged in 4.5 hours. Its lightweight and portable design makes it easy to take with you on the go, and its waterproof construction ensures durability in various weather conditions. Please note that the SM-BTE60 is required to charge specific battery models.