When i leave my 2010 Ultra parked for 5-10 days, it won't start. I get that "clicking." I've taken it to two Harley dealers (one of them twice) and an independent shop and the bottom line always seems to be the battery is bad. They charge it up and everything checks out fine. But replacing the battery has not solved the problem. If I keep riding the bike regularly, this problem disappears. One shop kept the bike for over a week and checked the battery each morning and saw the constant draw. He said, however, that the bike had no more draw than any of the other bikes in his dealership. I've heard some people say the cause is the security system that runs 24-hours. Now i've got a battery tender hooked up to the bike and I'll see if that solves the problem. At $150 to $175 a pop, I'm getting pretty tired of buying new batteries. I did install a new V&H exhaust system because the catalytic converter heated up so much it was burning my right leg. I don't know if the mapping needed to install the new system may be causing the problem.I'm beginning to think this is a series of engineering flaws. Anyone got any ideas or have had the same problem(s) ?