I have an iPhone 5 and the best way to connect it to my car stereo is USB in. The USB gives the best sound but I don t want to ruin my battery by charging and unplugging all the time. So basically I m looking for a data cable the transfers data, but will NOT change my phone.
Your battery would be fine no there isn't a cable that works like that.
Bluetooth connection does that. Any cable will do the charge.