You can use lipo for a battery but, you would need to use a regulator from companys like duralite and MPI to name a few; to drop the voltage down to 6V or lower. But the cost of the setup plus the reg wont be justifiable for something of that size. Plus its another point of failure your adding to your plane. Im using a JR 1500 pack and im getting about 4-5 flights with hitec 4 hs5625 and 1 5645 servo. Works by me.