The Silkroad Plus Snap It Bag from Vaude takes the lug out of luggage. This all-round rack bag offers 9 liters of carrying capacity with two fold-out side pockets that let you store 7 liters more volume. A good size to store your e-bike battery inside. Also comes with a cargo net for more storage. This sturdy bag can be securely attached via Snap-it adapter to all Racktime gear racks, and just as easily detached when needed.