I had installed brand new Optima red top 34R few days ago. I replaced my 3 years old optima red top for above reason. But with the new one same thing. I checked it drain baterry about 50 ma. I have a link for starting the car here: It happened when I parked my 2000 RX 300 more than 1/2 days. What could be the problems? Starter or 50ma drain is ok for this? Please let me know your ideas.

 

Go buy yourself a new starter. Its bad.

 

yup, on a modern car, 50 ma is nothing...

 

I ordered starter solenoid kits (like plunger, contacts, gasket, spring) from Sewell Lexus . I will try to replace them. Thanks for your responses.