I have a 2009 RX350 with 43,000 miles. (still under warranty) I've had to jump the car off four times in the past 3 weeks and have taken it to the dealer twice. Both times they said the battery checks out and can't find anything wrong. They suggested that maybe we left the key on ACC and that drained it. That's not the case. The battery is shot, I replaced it today and they agreed that the battery was bad. My question is that: 1) could something else be draining it? The dealer said that they couldn't find a parasitic drain or 2) Is Lexus service incompetent and dishonest? This is our first Lexus and so far, I'm totally unimpressed. Thanks.