We just picked up our 2015 SEL model with options package 301A (navigation and SONY sound). I am still familiarizing with the SYNC system. One thing I noticed after I drove out of the lot was that the battery indicator on the left hand side screen was at half mark and it didn't change as we drove the 25 miles home. Is this normal? will the battery eventually charge to full capacity? should I be concerned if it continues to be only at half charge? thanks