thanks for the help this is partically helpful for me. I am starting to get some of an understanding of the whole electric world. I was reading a lot the last few days and I have read that first thread that you posted. I will continue to read more. i am pretty versed about batteries and well aware of the laws of lipo batteries although I have never had any need for one till now. question nomber 2 will I need to go out and buy myself a watt meter before I go fly the plane just to make sure everything is working good ? I also was wondering about the wiring of hooking one battery up to all 4 motors ? As far as a battery goes it seems like a battery of that capacity means that I will have to disable the escs built in escs and power the radio with its own battery because what I have read so far the esc will not be able to handle the amp output needed to the radio to power the 4 servos recquired to operate this airliner. And granted a quad engine would complicate the setup a little more to understand whats going on. this is not my only electric project as I also have a bare bones from modelair tech that requires a speed 400 motor. that airframe is 2" wide, is 16oz, has a 160 sg inch and 30" wingspan. Im thinking about using something like the electrifly ammo 12 30 3850 inrunner and the best battery I can get to fit in the small little airframe.