Range Anxiety? Our sleek and unobtrusive Velotric Range Extender battery offers an extra 30 miles of effortless cruising capability. Designed specifically for both the Velotric T1 and T1 ST models, it ensures you can go further, explore more, and enjoy the ride without worry. More distance, more discovery, more delight. It can be firmly installed in the bracket. Battery purchases are final, batteries cannot be returned. Only Compatible with Velotric T1 and Velotric T1ST Bike Models.