 When there is no triggering signal the charging circuit is re-connected to charge the capacitor.The amount of energy the CDI system can store for the generation of a spark is dependent on the voltage and capacitance of the capacitors used, but usually it is around 50 mJ, or more.The standard points/coil/distributor ignition, more properly called the inductive discharge ignition system or Kettering ignition system, produces 25mJ at low speed and drops off quickly as speed increases.