Thanks for the link :)

I had heard of battery busses but never battery trams... It feels so weird to do, if you're already committing to a rail system, is a third rail or over head cabling that much more of an investment? That tram has a battery that'll need replacing at some point and I am really curious when the cost of replacing batteries will over take cost of a third rail/pantograph system.

This is genuine curiousity, not me just ragging on battery tech