This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
opportunity charging opportunitycharging slidein trolleybus battery bus batterybus electric rome outdoor vehicle Rome Italy trolleybus which also travels in wirefree batteryelectric mode. Opportunity charging is carried out whilst in motion. This is known as 'SlideIn'. Note that after years their batteries became life expired and