Vaude silkroad plus pannier bagtakes the lugging out of luggage this all round rack bag offers 8 liters of carrying capacity with two fold out side pockets that let you store 7 liters more volume all in all a good size to store your e bike battery inside also comes with a cargo net featuresinner zip pocket zip pocket in the lid expansion bellows luggage spider 2 side compartmentsremovable shoulder strap velcro attachment onto luggage rack safety light attachment reflective elementsweight 0