There is no CD player so you are listening to commercials and DJs constantly. The XM radio is the old FM radio from the 1970s except this time you have to hear the commercials, hear the DJs, and PAY FOR THIS?????? Go under a bridge often? Drive in rain and snow that happens when the skies are cloudy and no reception is possible? The only USB port is in the back seat. When your cell phone is plugged in and streaming, the cell battery is dead in about 2 hours. Is my cell phone charging the Porsche battery?
While this won't solve your problem (Bluetooth is a notorious power hog), it might alleviate some frustration. Personally, I love SiriusXM. https://www.pcmag.com/picks/the-best-portable-chargers-and-power-banks
