Battery Life

[midtown328i]

I have a Blaupunkt headunit in my car which allows me to turn on just the headunit and listen to music. I would like to be able to do this while washing/waxing my car and I'm wondering how long would I be able to have the radio on without running down my battery too much. Remember that the car won't even be on it will just be the headunit thats on. Thanks.

[E36DJ]

A fairly long time, easily enough time to wash your car unless you are like clay-baring/waxing.

I would say a couple hours, bmws in general have massive batteries.

[Alex328is]

I wouldn't make a habit out of doing that though. You are draining your battery slowly each time you do so. Be careful if you do this if you live in a colder climate.

[Secret Spider]

yea you will be buying a battery very soon if you do this too much. I feel you tho, i love listening to my stereo while cleaning my car. I just had to buy a new battery tho so just get little boom box.