I have a 2011 Super Z Hyperdrive with roughly 150 hours on it. A few weeks ago while cutting the blades quit, then started back, then quit again. Then the mower died. I tried to start it back but it would just click when I turned the key. I noticed a little corrosion on the positive battery post so I cleaned it the best I could and then jumped it off. It did ok for about 2 minutes and then the exact same thing. I got it home, thoroughly cleaned the battery posts and put it on a battery tender and have not had a problem since. I didn't really think anything of it until my buddy called me yesterday and his did the exact same thing. His has about 350 hours on it. Neither of our dealers have a clue why they did it... anyone have any ideas? thanks for the help in advance.