ctteacher5 0 Report post Posted November 22, 2010 My 2006 Lexus SC430 battery completely discharges over the course of a 10-14 days. Is this normal? The dealer says the computer causes this and that I should keep a trickle charger attached. Quote Share this post Link to post Share on other sites
intakerGS 0 Report post Posted November 22, 2010 (Fast) discharging depends on some factors. 10 days is a bit on the short side. - The battery is EOL. - Something (car-alarm?) is drawing power (parasitic draw). Draw must not be over 25-50 milliamps. - Battery isn't fully recharged by bad alternator or corroded wiring. Your dealer (or any qualified electrician or shop), can check above easily. Quote Share this post Link to post Share on other sites
pj8708 83 Report post Posted November 23, 2010 Had a similar problem with a 05' ES. The battery would discharge over 14 days. Turned out to be a bad cell. Paul Quote Share this post Link to post Share on other sites
