E-Bike Battery Rack Bag – store your battery or take an extra with you on your ride (Black)

• Easily mounts to a bike rack with hook and loop straps
• Fits most batteries , 5″ x 5″ x 17″
• Compatible with Bosch Powertube batteries and many others
• Made with flame resistant inner liner (passes FMVSS 302 Flame Test)
• Zipper Closure, Battery Cord Ports, Carry Handles, Mounting Straps, Reflective

https://www.roadbikerider.com/bikase-fireproof-ebike-battery-storage-bags-review/