Its 7.2 volt for one, and that just wont work, and if you put a regulator to get it down to 4.8 you are just wasting power. I use a 3000mah pack of NiMH cells(4), and it works great. It weighs a little more than your standard 1300mah pack, but it will run way more flights, and it only cost 27.00 for them to make it for me. I aslo get the added protection of having them do a couple more welds on the tie bars, and double wraping the pack for me.