High Battery Drain

[X5WannaBe]

For the second time in 2 1/2 months since owning my E70, I have gotten the warning message "high battery drain." When starting the car the check symbol showing the car up on a ramp is displayed and the text "high battery drain" (or something very similar) is visible. The first time this happened over a month ago, I thought it might be related to leaving my iPod plugged into the 6fl connections. But it hasn't happened again till now. But as before, it did not repeat after reentering and restarting the car later. I did unhook the iPod this time.

I guess I don't know for a fact that this is a real problem, but I wouldn't want to be caught with a dead battery at an inopportune time. Anybody have a similar experience or notion of what this is? Thanks, Roger