Our batteries seem to run down fast. I checked the voltage of the battery. It read 10.31 VDC. When I plugged it in to the charger the green light came on indicating full charge. BTW, What is the difference between the 0.9 and 1.8 switch settings?

1.8 should charge the battery about twice as fast, we have not has an issue w/ batteries running down, did you fully charge them before using them for the 1st time? We had a problem with stock fuses blowing. The charger says they are fully charged but none of our motors would run. (this happened to all three teams at our school), but since we have replaced them and everything is fine.