I have been told that NSX OEM stereo has a brain box that needs to be saved or backed up if you are deciding to disconnect the battery or replacing radio with aftermarket one? My battery is constantly draining if I don't drive it every other day. Also my air condition only can be turned on high or low, no medium option. I was told this was because the memory was compromised by disconnecting battery. trying to receive feedback since these are non-NSX owners telling me this.