if you dont wanna get the batt from lexus directly, go to your local radioshack they will not only have it (most of the time) but will be more than happy to change it out for you. in terms of the Ipod thing, its good but limited and too many cords if you run it to the tape deck. i reccomend an FM transmitter you can attach to the top of it. or better yet, Sirius sattelite radio, got one on my dash, FM transmitter built in so no wires to the radio, antenna on dash under winshield works PERFECTLY without as high of a cost as an Ipod and no need to remove it and erase it and add new songs when you get tired of what you got. just a reccomendation.