From Miniature to BIG

Whats the squashed middle car for...Battery's?

No, that houses the Diesel engines which are used for parts of the network in Italy that are not yet electrified and when the batteries are getting exhausted.  The idea is in electrified areas it uses the pantographs to draw power from the overhead lines to run the train and charge the batteries.  Then on non-electrified lines it will use the batteries first and fall back on the diesel when the batteries become drained.

They are actually quite comfortable trains as well which is nice, an application for hybrid technology that actually works as it should.  I'm still not convinced about hybrid cars, especially the plug-in variety they were only invented to circumvent the UK tax laws.  Often the batteries in that type of vehicle is only good for about 20-40 miles, then they use the fossil fuel engine.  Self-charging hybrids are a better compromise, but still not perfect as they rely on sensible driving to prevent the fossil engines from being used too much.