LEGO Scalextric?

Question

I have a couple of these car parts in my collection but cannot find anything about them. They are copyright 2003 and show a number 3213 on the back axle.

Interesting is that they have 3 electrical connectors on the underside that suggest it gets power from a track of sorts. Something like LEGO scalextric.

Can anyone shed some light on what this is and how it worked and was controlled?

Answer 1

Sounds like this:

Which can be found in set 8364 only. It's recharged by pushing the car on a charging track piece, itself powered by batteries:

.

Not particularly good, but the sheer number of track parts in the set makes it interesting to buy for some people.