you could also run just A carbon boom kit with your stock hood and just cut up the hood a little. saves weight. actuly makes it lighter.
also as long as its a 7.4volt batt with a blance port it will work with the heli. I my self like the Tenergy V2 10C 900mAh 7.4 volt 2 cell.
I got a few from a mom and pop shop for 11.25 a pop. An extended inner shaft is also a good way to stop breaking blades do to blaed strikes. Have fun ... I do