The charger I will build simply limits the current of the charge to a constant rate, thus looking after the battery a little better. These fast charge cycles are not that good to start with, but I anticipate that connecting those fourbatteries to the car is probably one of the worst ! With that configuration, the intial charge rate will be very high as the cells increase in voltage and then it will ramp off. Constant current charges simply look after the cells and limit the maximum current applied !
-Daz.
