How long does your batery last with the raiod playing.I thought my battery needed replacing but then realized it was dying so fast while listening to the radio cause I would turn the key one more click to turn on all the electrical stuff not just the radio. I took it to autozone and they said the battery was good. I left it alone after that, but today I was watching a movie on my nav screen and the car died 40 minutes in. I was thinking of getting one of those optima deep cycle batteries. Just want to make sure the ls doesn't have retarded wiring that causes the battery to drain and doesn't let you enjoy your radio.