[Si Coe]

Well you can't over balance charge so if you want to to it every time thats fine.
Personally I balance at home and straight charge at the track. I've got lots of different lipos for different cars, and they don't all use the same balance connectors. Also, the ones with built in leads are very short so can't be charged still in the car. However, everything (even the micro T and the lipo in my transmitter) has been fitted with a deans connector so rather than faff with balance leads when time is short I can just hook up to the Deans and go.