So far there is no AC adapter sold for Rapiro.

Recommended spec is 4A and over.
http://international.switch-science.com/catalog/1550/

Can't guarantee but 6A may be fine.

This thread might help you.
http://forum.rapiro.com/thread/7/

Be very careful I have had my Rapiro for 1 day (and a good 5 hours of that was building it) and all was working well (I should have quit when I was ahead), I decided to try an adapter that matched what I believed to be an acceptable match given the specs above (see image). Within a second of pluging it in smoke started pouring out of poor Rapiro's body. It seems I fried the motherboard. My dream of becoming a robot owner is now over.

Hello.

Rapiro needs 'Center-positive, Barrel-negative' AC-DC adapter.
I guess spraycan_man uses AC-AC adapter.

The adapter's worked for the most part. Been using it for a month now but only in spurts of half an hour or so. The board tends to heat up pretty easily

I have got an AC adaptor now, it works fine. Much better than on Batteries which didn't last long. My goal is to have my rapiro monitor my room :). But my concern is same as @kobe_23, it heats up I'm worry that it will burn up... any body has similar issue, maybe added a cpu fan?