After sitting all winter, my Toro riding mower won't key start (have to pull start it). Turning the key, it just clicks continuously. I checked the obvious stuff -- the wiring, contacts, etc. It's all fine. The battery is fairly new, but I'm not sure how to test the charge or recharge it (don't want to start screwing around with jumper cables, without knowing what I'm doing). Seems that would be the place to start. I'm willing to buy a new battery, but don't want to do that only to find out it's something else. Any ideas? Thanks.
-jk