Originally Posted by
GaRsNoW
I assume "high discharge" does NOT mean that it will "discharge" fast in the vehicle. I think it means it can be discharged at a higher rate on a charger.
guilo is right here. High C rating or discharge rate means for a given voltage, the battery can provide more peak amperage. Of course it doesn't matter how it's being discharged... whether in the car or on a charger, the battery will be able to dump more quickly (not that I've seen any charger that can discharge at an amperage near what your car's electronics pull).