there is not enough room in the ras to put any battery... you must use the shitty grip-battery holder, i use either a 8.4v 1500 mini battery or this,...
http://www.hobbycity.com/hobbycity/s...idProduct=7362
edit after mesuring mine with a caliper MAYBE the one you linked will fit but it will be tight as hell and a pin in the ass to install. and 11.1v wont shred your mechbox if she is well built... i runned a 11.1v lipo on kracken mechboxes without a problem
other option is a full stock (witch i'm thinking about because i'm tired of dissasembling the whole front end to remove the battery)