Murray rider ( 14.5hp) will not start. Totally dead yesterday, took battery out and had charged for 3 hours at shop. Today it is just clicking and won't turn over. I have never had other issues besides the battery, mostly from not starting it periodically. What do you suggest? Could the battery have lost its charge from 7pm last night, till now? (15 hours later)

Thanks Elizabeth

Try having the battery tested,it might have a dead cell,and is not holding the charge at all.most auto parts stores will do this for free.