That sounds really suspicious.

You're telling me.

Then again, there's this theory: Main 12v power voltage fluctuates and perhaps even does a negative spike when I shut off my car's ignition. Unless I have the engine running, I often get the "battery icon" on the player, especially if I get a big bass hit. So maybe something is making the GPS think that it's been pulled off of mains power or something. I dunno, the thing is a real black box to me.