Description: The quick removable modular battery lets you able to charge the battery pack on or off the frame. Also, charge your phone with the battery USB port. The battery of the Heybike e-bike is also set up with a key to keeping your battery safe. Features: 1. Lockable and removable with two included keys 2. Built-in charge level indicator 3. Weight: 9.35 lbs 4. Voltage: 48V 5. Total Capacity: 12.5 Ah