Hi I have a 14 mile mixed hill and flat commute each day and have found a fold-able lightweight e bike but my main concern the lithium Ion battery 36v 10ah (3.2kg) is mounted on the seat post, are these style bikes steady in windy conditions also would I feel movement and too much rattle with such when going over bumps in the road the bike weighs all in 23.6 kg and would I be able to get this nature style battery ? it looks like over foldable seat post batteries found on the KUDOS sport and the CLYCLAMATIC pro, please bare in mind this is solely for commuting not off road. Any thoughts suggestions out there.