Guys, I'm currently building my 2nd (and 3rd for that matter) Battle Axe kits and need to pick up a couple batteries. I honestly can't remember what size pack I used in the first one, so I'm trying to figure out what fits. Obviously I'll probably go with a 4.8V AAA or 2/3AA pack but not sure if square or flat would be preferred for fitment reasons. Thought I would ask the guys who would know right off the bat.

I'm going to be using Hitec Minima 2.4 receivers so I did consider using 6V packs, but I'm probably just overthinking things there.

I can't answer the flat or square pack question, but I use 2/3 AAA 400 mah flat packs from cheapbatterypacks.com on all my combat birds that weigh about an ounce.

I did however order some of these for my Open B ships and they have yet to arrive. LiFe 6.6 v 700 mah and weighs about an ounce and a half. Cost less that 3 bucks.
I know of several combat flyers using this pack with good results.

Ahhhhh,  Hobby King snipes another victim.  Make sure and get one of these chargers   or equivalent.  This is what I use to charge for our Friday night electric combats. 

Yes that is a good little charger, I bought the $17.99 version and it has been holding up great.

If it fails then my icharger will do the trick

PERFECT

Because the only flames in combat should be the ones you target is going down in!<br type="_moz"/>

I hadn't even thought of a little LiFe battery - I'm using them in some of my bigger planes already, so I may go that route. I already have the HobbyKing [link=http://www.hobbyking.com/hobbyking/store/__10327__HobbyKing_Quattro_4x6S_Lithium_Polymer_Mu lti_Charger_.html]Quattro charger,[/link] which I'm told uses the same circuitry as the Turnigy 6 - or four of them, rather.

edit: Doh! Backordered. [:@]