Thanks a lot, this is indeed very helpful. Yes, it has the sound of rattling - I checked and found that battery foam bumpers are compressed, so I will replace them. Explanation about the controller is also very helpful, much appreciated!
Dear Emotion community, can anyone recommend how to adjust easy motion neo cross battery? It is loosened now on my ebike and I want to know if there is a way to tighten it so that the curved battery sits tight on frame. Many thanks.