Cheers dc42, really appreciate you getting back to me so quick.
Edit: You too, runaway pancake! You must have posted that just as I was making this reply!
5 or 6 AA batteries is something I can live with (especially if they're rechargeable) if it provides adequeate current for all of this 
I was a little worried someone was going to say the only way is to have 4 batteries per servo or something!
How do you actually judge the max current you can draw from a AA battery? My understanding is the mAh rating on a battery (e.g. 2,700 mAh) is a rough indication of how long the battery would last if you drew that much current from it continuously (so the example would last 1 hour if you drew 2.7A continously or 30 mins if you drew 5.2A continuously).
The reason I ask is that if I connect 6 AA batteries in series, my understanding is the voltage may be 7.2v (where each battery is 1.2v), but the current remains the same as if there was 1 AA battery. If I connect them in parallel, then the volatge remains as 1.2v whilst the max current you can draw goes up by the number of batteries connected.
I'm slightly confused as to how I can draw enough of both the voltage and current from the batteries to power 6 servos, if they need 4.8-6v each + 1A each (in theory), if I connect these in series and 1 battery on it's own cannot provide enough current?
Sorry for sounding like such a total beginner, but electronics is all new to me I'm afraid. Software on the other hand, I'm fine with! I've been doing that for years!
Really appreciate the help, and thanks again for taking the time to respond to me.