I just read up a bit on it, and the specs say 3200mah, and I happen to have some 3300, and 4500 packs. As for the Bigfoot, I am starting to really love it. Funny story but I actually got it at the first release probably 2 years ago now. I built 95% of it, then hung it up in my garage. I listed it for sale a few times and no takers, so I finished it. During the finishing stage I had some minor issues with the windows and struts and a few other little minor things that made it seem a little rushed to production. About a month or so ago I flew it, and for the first 8-10 flights I concentrated on getting the new OSGT33 to run reliably (which it was fairly easy other than it starts backwards every time below half throttle). During the first couple flights, the struts fell off repeatedly, and every window came out on different flights. The door hatch also came out and the tail wheel assembly is junk. So, I found a great glue for the windows, screwed the door shut (relocated easy access items to the hatch), and removed the struts completely after several reports of folks not using them. Now I have 5 or 6 flights on it, with everything holding and the motor running great. The flaps are large and drop straight down which is a blast. I can chop the throttle and dive it at well above a 45 degrree angle and land in a very short distance. I call autorotations as it feels very similar when I do them with my helis and it also takes off in probably less than 3 feet of rollout. It hovers, and harriers and I have done some fairly violent tumbles with it and the wings hold great. Assembly is as quick as any 3d plane with just the 2 wing bolts and no struts. It truly flies like a 3D cub. It will tip stall but you really have to try to get it to. Several guys at the field are now waiting for them to come back in stock. It really has turned into a very fun plane. Touch and goes are awesome and with the long tail and large surfaces it never wants to ground loop like traditional cubs. I am starting to really love it!