2011, 66k miles, flat battery issues

mpinco · Nov 18, 2019

LR4's love to eat batteries. Four years? Not bad. When they go, bam, flat.

Now think what the newer vehicles will need with all the additional electronics!

Robuk · Nov 19, 2019

mpinco said:
Now think what the newer vehicles will need with all the additional electronics!

Irreverent, the alternator the manufacturer installs is quite capable of providing adequate energy to run all these additional electronics and more, the real problem here is smart charging which often leaves the battery in a partial state of charge for extended periods, this shortens the life of the battery. Disconnect the sensor attached to the neg clamp of starter battery and the battery will get a full charge and last much longer. Try it, if not happy just reconnect it.

mpinco · Nov 19, 2019

Robuk said:
Irreverent, the alternator the manufacturer installs is quite capable of providing adequate energy to run all these additional electronics and more, the real problem here is smart charging which often leaves the battery in a partial state of charge for extended periods, this shortens the life of the battery. Disconnect the sensor attached to the neg clamp of starter battery and the battery will get a full charge and last much longer. Try it, if not happy just reconnect it.

Maintaining increasing levels of ECU's when the vehicle is off is not dependent on the alternator. Agreed, smart charging has issues.

Robuk · Nov 20, 2019

mpinco said:
Maintaining increasing levels of ECU's when the vehicle is off is not dependent on the alternator.

That`s correct but the car once locked should go to sleep within about 10 minutes, the drain on the battery should then be minimal otherwise the car could not be left at an airport or similar for lengthy periods without the battery going flat. Regarding the ECU`s energy draw, this is in milliamps I believe.

2011, 66k miles, flat battery issues

mpinco

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Robuk

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mpinco

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Robuk

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