Map of trolleybuswires in Praha at 2017. The "electric hill" at Prosecká-street are ~1km long and will be using for electric travel and also loading of batteries for the rest of the line without wires. At busstation Palmovka are exist also ~30m long part of troleybuswire, it will be using for loading the Trolleybus while pause. A video of this system can be found here (11:35 min):
https://www.youtube.com/watch?v=TJQnKtaQcac