Yes, rcairflr is right. I had a feeling this is what happened, that's why I immediately asked you your charging rate. Discharging is just what the name implies, letting a battery cycler put a load on the battery to drain it. A good cycler will tell you what the capacity of the battery was. A good battery will be at least 80% of rated capacity; however, new batteries take a few "cycles" to attain full capacity.