Hello. Potential future buyer of two Portola folding e-bikes. I realize I can contact Ride 1up and ask this question however, can any owner give us the dimensions of the battery so I can buy a padded bag to transport the spare(s) on our bikes. Is the long range battery the same physical size as the regular battery ? Any recommendations to carry spare battery other than just strapping to the rear luggage rack ? I’m not beyond building a specific clamping/ holder/ device. Thanks for your replies.