well i'm going to schooling for electrical engineering, so i should def. be able to in a few years(right now i'm only doing gen. eds.) . i just know nothing of the circut board, and how and where and what kind of engines to use or battery. but i got some questions. can i use a lipo in my original tycos? like i saw a 7.2v lipo but it looked tiny, and had what looked to be AA or AAA cells, where as my &.2v is clearly C cells. I have one NIMH battery which seems to give my super fast traxx a little more life. and MAH on the battery what is that milli amps an hour? so does it matter how high that number is? what is the best battery for my cars? haha sorry for all the questions.