What does RC or reserve mean?
RC stands for Reserve Capacity . The BCI defines this as the number of minutes which a new, fully charged battery at 80F can be continuously discharged at 25 amperes and maintain a voltage equal to or higher than 1.75 volts per cell. This is a useful number should your battery have to provide power for ignition, lighting , etc. in the event of failure in the vehicles electricity generating system.
