Well there's link one and the revealed 'secret' of what I put in a Google Search.
Other 4 links are:
http://stibat.nl/ The people who own the Batteryman character
http://batteryworld.nl/ Some site made by Stibat for kids to learn about batteries/play games/read comics.
- Any site with codes for the game
-Any site with the game's demo.

I'm no longer sure that's how I got my information on the game looking over the links, but those are the 5 sites I visited to get some information.