Energy Tree

In Bristol for the day and my favourite walk route to the office is through Millenium Square. There's usually something going on, a few skateboarders, kids playing in the water falls, news on the big screen.
At the moment there is a big Energy Tree in the shiny corner. Not sure if it's a permanent feature. It has little solar panels on its branches and plays music. According to the sign there is also a charging point for your gadgets, but couldn't see it so maybe it's gone.