you can also put the battery on its side, and modify the chassis to use velcro straps instead of the stock battery clamp, so you can fit larger batteries such as these.

http://www.hobbycity.com/hobbycity/s...idProduct=9937

http://www.hobbycity.com/hobbycity/s...idProduct=8932

as can be seen in my RC18t thread.

http://www.rctech.net/forum/micro-mi...new-tyres.html