I think Garys issue he's bringing up is that LiPo voltages are multiples of 3.7v. 14.4v was an old NiCad/NiMH voltage. So running if those batteries you're running are connected in series they're be more than 30v, as LiPo's they will be either 11.1 or 14.8v nominal (3s or 4s) and really pushing the limits