Going for a jaunt up or down the Seine in Paris is a popular tourist must-do, and there are some 150 or so commercial boats in operation to cater to their needs. River tourism company the Seine Alliance has partnered with Groupe Renault and Green-Vision to launch the Black Swan, an all-electric cruiser that makes use of second-life Renault batteries in a similar fashion to the Nimbus 305 Drophead E-Power from 2017, which was packed with BMW's i3 batteries.