...are finally beginning to come of age. We all laughed at the Sinclair C5, but now motor and battery technology have progressed to a stage where an electric motor for your bike is no joke. Ideal for where the hills just get too much for you, if you want to carry lots of shopping, or want to get to the office without arriving all hot and sweaty. Motors are available for £70, but for a good motor or bike expect to pay £700 and above.
Give me more detail please...