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I think (I don't know for sure) that it may have something to do with the way remote car starters are designed -in particular, the units' signal receiving device (what ever the discreetly attached antenna, usually on the upper corner of the windshield inside your car cabin, thingy is called).

I noticed that the LED flashes very brightly, and/or stays lit -equally bright depending on the mode its in (24/7, whenever the vehicle is not being driven. While driving the said LED is not on, thank God). This LED can literally light up a darken single garage to the point where you'd be able walk without needing to turn on the garage light (that is the case with my remote starter unit, and it's a 2013 model).

Therefore, I think perhaps one might be able to draw one conclusion; that such a constant drain on the car battery can't be healthy over time for the battery's overall health -as the LED is constantly using up power (despite the fact that the car battery does "self-replenish").

This is LED "issue" is certainly one contribution that I can think of even without any knowledge of electronics.

I hope I am wrong about this, cause I have the same concern. : )

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Q: Why Remote starter starts car but drains battery?
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