MY BATTERY KEEP DRAINING IN MY 2008 RX 300 SUV

Pull the negative off the battery. Put the test light between the post and the ground wire. If the light illuminates, you have a draw. Use the fuse pull method to find the draw; when the light goes out, you found the draw. The dome light should be removed and the radio fuse first as they draw power when the door is open and dome light draws and the radio draws to keep settings and time.