Motorcycle battery dead

I won a 2013 Harley 883 Iron. I don't ride it very much and it has very few miles on it. I live in Central Illinois and kept it in the garage all winter. I charged the battery and it started. I only let it run a few minutes. Two days later I went to ride it and the battery was dead again. I recharged it today and the battery charger indicated it was a full charge but still it won't start as if it is dead. The chargers FAULT light was on but it also said full charge. Do I maybe have a bad battery?

Motorcycle battery dead