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I'm in my work car a lot and my only option currently for getting music/podcasts to my car speakers is a 3.5mm AUX port on the dash. I was wondering what the power consumption difference between Bluetooth 4 and that AUX port are?

I'd like to buy a Bluetooth 4 adapter for the AUX port and run it that way if it will save me battery life on my phone as it's easier to have it connect automatically than having to plug it in and I don't overuse the headphone port on the phone.

Any insights would be appreciated.

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Don't have specific data, but by just keeping your bluetooth radio turned on will draw power. But I doubt a battery replacement would cost more than a jack replacement (can you even replace it on a phone? I mean... it's basically soldered to the mainboard.) –  Shiki Feb 2 '13 at 18:08

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From personal experience, I have to say that wired devices use less power. Having Bluetooth enabled on my wireless devices drain them so quickly that I now avoid Bluetooth altogether.

I tried to find some documentation to back that up, however all I can find are forum posts stating the same thing. I cant find any documented cases of a study showing the power differences.

Still, this would be an easy thing to test with your hardware.

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