Not far off a year now, I'm amazed at the patience of some forum members here.
http://www.pedelecs.co.uk/forum/threads/first-electric-bike.15433/
http://www.pedelecs.co.uk/forum/threads/newbie-looking-for-first-electric-bike.15428/
I think I've flattened the 300 w/h one in 14 miles. I flattened both the 300 w/h and 400 w/h battery on this ride below, probably a mile or so left.
http://app.strava.com/activities/122064066
Although I did do the same ride two days earlier with less wind and less time in turbo, the one above...
As I've said, 15 miles to flat is just an educated guess. I know my Bosch battery shuts down sooner than the Kudos one will, so perhaps it'll take me 17 miles.
How much climbing do you do in those 30 miles I wonder?
The reality of the battery actually going flat in just 15 miles I guess isn't something you'd want to tell a potential customer.
So when you tell a customer that the battery will last 30-35 miles I bet you don't say "ah but only if you ride it in the correct manner" and then go onto explain...
An earlier article with video.
http://www.yorkshirepost.co.uk/news/main-topics/general-news/video-spark-of-hope-as-cycle-veteran-83-takes-on-toughest-climb-1-6280719