April 18, 2022
Battery on my 2005 Lexus LS 430 dies after 2-3 days of inactivity.
The battery is new (tried 3 new batteries in last 3 years).
Alternator is also new.
Battery and alternator were checked by a mechanic who said both are good.
If I disconnect the battery it does not drain and stays good for up to 5-6 days.
If I leave it connected, it dies in 2-3 days. So, it indicates possible parasitic drain.
But, when I check the resting voltage/current using a multi-meter, I only get 30-40 milliamp which is less than 50 milliamps that they say is "normal" and sort of rules out parasitic drain per my reading.
Question:
1. Can the car have parasitic drain even if the resting (30 minutes wait and everything off on the car after disconnecting negative cable) voltage is less than 50 mA? In my case, even if it is less than 30-40 mA?
2. If parasitic drain is unlikely with a resting voltage of less than 50 mA, what could be other reason/s for battery drain within 2-3 days of inactivity?
Thanks a lot friends, for whatever help you can provide.