**broken link removed**
I fly model airplanes and I would like to build a charging circuit to charge a single nicad cell. I would like to be able to charge it at the flying field at 1C (1100 ma) from a 12 volt 7 amp battery. I was planning on using the circuit in the link above called Constant Current Battery Charger using the circuit with the lm317, but the power consumption is very high. Is there a way for me to charge the battery consuming less power, but in the same time period?