Capacity: 504 Wh (36 V, 14 Ah). Fully charges in 5 hours with the EC-8004 charger. Temperature: 0 °C to + 40 °C (during charging), -10 °C to + 50 °C (operation). The durable battery retains more than 60% of its original maximum capacity after 1,000 full charge cycles. Compatible with the integrated diagonal tube battery mounts of the second generation SHIMANO STEPS. Durable construction with IPX5 water resistance, protecting against the elements and low-pressure washes. Considers the elegant design of the frame. Same support as BT-EN805 and BT-EN806. Same appearance as BT-EN806. Features: Our integrated second-generation 504 Wh battery for the down tube has a compact design and a lower center of gravity for a more natural riding experience. High-quality cells help it charge quickly and maintain maximum capacity for longer.