Plug the USB converter into your car's cigarette lighter and charge your phone as you drive. The other piece is a magnet which clips on to an air vent; stick a magnet on your phone to secure and it's almost hands free. I found it really useful for google maps but don't need it now as I've changed my car.
Fair Offer Policy applies
In-car USB converter (Whitchurch HR9)
This offer has been gifted to someone and is no longer available.