The Velotric Rack Battery Bag is designed for riders who go the extra mile. Featuring a weatherproof outer shell and a built-in battery compartment, it securely holds 1–2 batteries—perfect for extended adventures. Hidden pannier bags on both sides easily unfold to provide extra storage space when you need it most. Compatible with multiple Velotric models and easy to install, it’s the ultimate travel companion for your next long ride.Compatible with Velotric Discover 2, Discover 3, Discover M, Discover 1 Plus, Summit 1, Fold 1, Fold 1 Plus, Nomad 1 Plus, Breeze 1, GoMad, Nomad 2, Nomad 2X, Summit 2. (Modular Rear Rack Required) and Tempo(Rear Rack Required).