I would like to ask you to implement the possibility of displaying the Charging station type of Point of Interest (POI) in your applications. The OpenStreetMap (OSM) does contain this type of POI and it is present also on their maps (maybe not so frequently, but without being able to use them in good navigation apps the OSM editors will not have a motivation to add them).
I believe that having the option to show and filter out this type of POI is essential for existing and potential Electric Vehicle users and its adoption would result in growing your user base.
You can download and install your own from POIplaza. See this page for a list of international charging stations:- international http://poiplaza.com/index.php?p=sdb&d=10621&lstpg=search Most of these however seem to be in Germany.