sentences:  These battery swapping solution have been criticized for being proprietary.By creating a monopoly regarding the ownership of the batteries and the patent protected technologies the companies split up the market and decrease the chances of a wider usage of battery swapping.The principal suppliers and manufacturers of charging stations offer a range of options from simple charging posts for roadside use, charging cabinets for covered parking places to fully automated charging stations integrated with power distribution equipment
  
  An operator manages charging stations from one or more manufacturers.