The exposure fast charger for the reflex is only compatible with 2013 reflex six pack and maxxd it delivers a higher level of charge 28amps compared to the 15amps of the standard smart charger reducing charge times by approx 25 it operates in the same way as the smart charger with the light on the charger showing red while charging and green once charging is complete during charging the back of the light will also indicate the state of charge