Even though the plug is locked during charging in public charging areas, the 'gun' can easily be removed, this can easily be overcome by drilling a hole in the release button in order to attach a padlock for example to prevent the button from being pressed
Also the range remaining bars should be separated into pairs of alternate colours, this way it is easily read instead of having to concentrate on the display
Also the range remaining bars should be separated into pairs of alternate colours, this way it is easily read instead of having to concentrate on the display