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Message: <blockquote data-quote="RossKean" data-source="post: 1262742" data-attributes="member: 19880">To start like a dog (or even not start) one time and then start right up the next (after a short wait) doesn't sound like battery to me! A battery can "recover" by waiting (to some extent) after a heavy drain (like leaving lights on) but that does not describe this circumstance.By bet is on the starter! Possibly the contacts on the starter relay are going south instead but I think this is the direction you should look.Best way to diagnose whether the starter is going bad is to check the cranking amps using a DC clamp-on ammeter. Of course, you need to make sure that the battery is OK. If you do not have an on-board voltmeter, pull the battery, charge it fully using a trickle charger and get it load-tested.Note: You can check the battery tender function with a voltmeter. Assuming you are running at near room temperature, the float (maintenance) voltage should be around 13.6, if I remember correctly.</blockquote>