Good NiCd batteries are 2000 mAh and can be supplied with 5 A charging current in less than 1 / 2 hour load. On the green lawn flight is often the only car battery power source.For flight NiCd batteries... Electronics Projects, DC to DC Converter circuit TL494 12V to 30V Adjustable "dc dc converter circuit, power electronic projects, tl494 circuit, " Date 2014/06/21