Mobile metering (recording of data using a ) is a technology which enables mobile recording of metering data. While railway companies such as the German Deutsche Bahn have been using this technology for years in their trains, it is now also being used for recording the charging transactions of electric vehicles (EVs). Weil/Neumann (January 2016). "Vergleichende Betrachtung der Sicherheitskonzepte von Mobile Metering und Smart Meter Gateways". Physikalisch-technische Bundesanstalt (National Metrology Institute of Germany). 125: 53–58.