Battery has never worked properly and it keeps cutting out. If it does actually work the the noise it makes is a horrible and makes everyone turn and stare at you and range is nowhere near what is advertised, maybe just 1/3rd. Riding your bike without help from the battery feels like having the brake slightly on so not a great experience trying to get home when it stops working . This is the same for both of the systems that I bought. Customer service just stopped responding to my messages so I'm left with 2 very expensive door stops and 2 fancy looking wheels hanging on my shed wall.