Just be careful not to get confused between Watts and Watt Hours. Mario's figures above are all in Watts, so that 22.2W of power is actually 22.2Wh. Which means it can give that much energy for an hour. It can supply a lot more power than 22.2W to you system but for a shorter amount of time.

As your unsure of what capacity ratings etc mean, I would recommend using a different battery type for now until you have gained some hands on experience of using and charging batteries before moving directly to Lipos. It's a curve we have all done here as Lipos are a fairly new chemistry, and not as fool proof and safe as other types available. A lot of people now take lipos for granted and recommend them to everyone - however I personally advise caution even to the more experienced roboteer's.