I have a Powacycle Salisbury, which I have owned for about 7 years. Mrs Salad has a Powacycle Windsor which was bought at the same time.
We only use them for occasional trips to the local beach, except for one week in August each year when the folk festival is on locally, and car parking becomes impossible. In that week, the bikes get used a lot, ferrying us, our instruments and other assorted droppings to and fro the town. I would guess that their battery life is now down to about 15 miles, but then we are oompa loompas!