E-Bike Battery Bag - store your battery or take an extra with you on your ride - Easily mounts to a bike rack with hook and loop straps - Fits most batteries , 3.5" x 3.5" x 22" - Compatible with Bosch Powertube batteries and many others - Made with waterproof and flame resistant inner liner (passes FMVSS 302 Flame Test) - Sealed construction with roll up closure and buckles