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Rx450h dead... suspect dead 12v battery

jumbojake
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Tom, Enthusiast

Tom,

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JCT - are you saying that the only time the 12V Battery gets charged is when the ICE is running? My journeys are alsmost all short, local ones on EV only and I have already had one flat 12v Battery incident.

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Tom, Enthusiast

Tom,

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JCT - are you saying that the only time the 12V Battery gets charged is when the ICE is running? My journeys are alsmost all short, local ones on EV only and I have already had one flat 12v Battery incident.

...........However, I have noticed that, when set for EV only operation, the car does switch to HV for short periods. Is this to put some charge into the 12V Battery?

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jumbojake Proficient

jumbojake

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The 12v Battery is charged from the traction Battery, but only after the 12v has fired up the computer, which activates the traction battery…. This is why a dead 12v is a pain.

the engine charges the traction Battery, but is only started by the traction battery… 

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