This bag from BiKASE easily mounts to a bike rack with reflective hook and loop Velcro straps.
E-Bike manufacturers recommend removing the battery from the bike when transporting it in a car or storing it over the winter, as batteries should be stored in a cool dry place away from anything flammable. These bags are perfect for storing a battery and provide an added safety layer with fire resistant fabric, allowing you to remove the battery from the vehicle or from your home to get it outside should it catch fire.