I got so excited by info from @Jimbo08 and you @Mike TowpathTraveler that I indeed ordered the e-Mate. That one will be used for my Turbo Vado.
Ortlieb Back Roller Plus will go for my touring Lovelec e-bike as I will need a lot of space for summer escapades. The Lovelec spare battery has two styrofoam cases for protecting each of battery ends and it will also reduce the wear of the pannier.
Unluckily, such solution is excluded in the case of low-step frames...
As I wrote before, the product is unavailable in Poland until next February...Keep us informed as to how it works out for you.
This video made me convinced, and the guy specifically mentions Specialized batteries (see him in a Specialized cap). He speaks German but English subtitles are there.Unfortunately in their product description they do not list Specialized batteries
I made a battery sleeve out of a foam sleeping pad and then attached the battery to my bike with a Salsa EXP handlebar cradle and viole straps. Works really well.
I want one of those ,not for a battery but to help me organize my kitchen sink panniers!Ortlieb Back-Roller Commuter Organizer | REI Co-op
Keep your items organized and in place while riding with the Ortlieb Back-Roller Commuter Organizer. It's designed to be used in a pannier to store a laptop, tablet, mobile phone, documents and more.www.rei.com
I place it under the seat.
Spare battery bag
Does anyone know of a good rear rack mounted bag that would carry a spare battery? I have a Topeak bag/pannier which is excellent but not long enough for my Yamaha battery.electricbikereview.com