$500 + shipping, Carbondale, CO I went to a bike shop today and found it fits a 2019 and 2020 Vado. It does not fit a 2021 Vado because the battery is now integrated within the frame. Battery is SBC-11-12.8Ah/460Wh/36. Comes with charger and key. Can send pic if you would like.
We've decided we are going to get a different bike and eventually sell the Vado, so we don't need the extra battery now, but hopefully someone else will buy it from you. Thanks anyway!