Hello Sergio and thank you very much for your precious advice. Yes, my goal is to power both the Roomba and the Galileo board from that same 14.4V battery I listed. Unfortunately I won't be able to get back to work until the beginning of January, due to Christmas holidays, but now I know that the first thing I'll have to do will be to check the currents and see if they exceed the recommended values. If so, I shall try to find a solution and keep you up to date, if that doesn't bother you. Again, thanks a lot for your suggestion and happy new year : )
Best regards
Sergio