Unbelievable bus battery booster

I saw this electric charging station for buses in the North Central Swiss village of Schaffhausen – but sadly, there were not any of the buses around.

It looks as if a bus can just drive up to one of these stations:

Here is the sign on the charging station, which basically warns you that the batteries in the station have enough juice to electrocute you for a full five minutes if you touch them:

And here is a snap from a different angle: