The Shimano Battery Case of SM-Btr2 is a reliable and essential accessory for your cycling needs. This battery case is designed to securely hold the SM-Btr2 battery, ensuring a safe and efficient power supply for your electronic shifting system. Weighing just 50 grams, this lightweight case is easy to install and provides protection for your battery during rides. The durable construction of the case ensures long-lasting performance, while the sleek design adds a professional touch to your bike setup. Compatible with various Shimano electronic shifting systems, the Battery Case of SM-Btr2 is a must-have for cyclists looking to enhance their riding experience. Trust Shimano for quality and innovation in cycling accessories.