I charged up my all four LiFePO4 batteries and put them into my Tayami QuickDrive R/C racing car with the four dummy batteries.The fresh charged-up battery voltage for two LiFePO4s was 6.8V in total and both sets are measured to be about the same. The car was then driven in a full-sized football court in full speed for about 10 minutes. It seemed that the overall weight of the car with batteries
