Battery Strategy
#1
Driver School Candidate
Thread Starter
Battery Strategy
Hello everyone. When I had my old '77 Toyota Celica Liftback, I would keep the battery charged by driving the car at least 30 min once a week. It became my 2nd car when I got the '97 LS400. I got tired of keeping 2 cars going and sold the Celica. I somehow forgot to make sure I drove the Lexus 30 min a week. In 8 years, I replaced the battery after initial 3 years, again 2 years ago, and Lexus dealer said it needs replacing now. I didn't replace it. It is functioning fine, but I do make sure to drive the car 30 min a week. Anyone have comment on necessity of battery replacement at certain interval?
#6
Moderator
Mine shows around 14.0V at P and 12.4V at D when idle after warmed up. These are when head lights are all off. With head lights on, those are around 13.5V and 12.9V each. This is because that the idle rpm is increased some. Once the car starts to run, it shows about 14.30V w/wo head lights.
Before I clean the throttle body, the idle was around 300rpm and the voltage was sometimes went down to 11.9V or less. Now it is around 550rpm and the minimum voltage is 12.4V.
So far I don't have any battery problem with my 98 Celsior but I think 12.4V is a bit low and it does not charge the battery. My family's Toyota cars never drop below 13.3V when engine is running even at the idle setting the AT at D.
Anyway my battery has been OK for more than 4 years with these conditions and I don't think I need to worry about 12.4V at D when idle.
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pman6
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05-18-15 01:49 PM