roughyear

Are most of y'all hoking up your iPhone/iPod to play music using Bluetooth or USB??

My concern using the USB, is it charges the iPhone while playing music, thus the phone reaches 100% full battery charge quickly, and if left plugged in, will overcharge the darn phone.

Using Bluetooth, and there is occasional interference, and for some reason, I have to turn up the volume on the iPhone all the way up to hear it through the stereo.

Bichon

Your concern is unfounded. The iPhone/iPod have a charging controller that automatically stops the charging process at 100%, lets it discharge a bit, and then tops it off again. Android and Windows phones have the same type of charging circuitry.