Warning..............
I've discovered a issue with the accessory socket that powers my tank bag.
In the third photo, showing the items I used to charge my bits and pieces, there is a multi outlet unit (2 Cigarette, and 2 USB's). Well this unit is lit when powered with led's. The cigarette sockets are lit blue.
Last weekend, I left the tank bag on the bike and plugged into the accessory socket. I then turned the ignition off and locked up.
Yesterday (Sat), I went to the bike to find it with a dead battery. It seems the led's in the multi outlet unit trigger the bikes canbus into thinking the BMW charger is plugged in, and keeps the socket live. This allowed the led's to slowly drain the bikes battery.
So beware................ Don't leave anything plugged into the accessory socket, as you could come back to a dead bike.
I tried to simulate the problem by just plugging the tank bag in with the bike already turned off, but the socket was already off.
You have to have something plugged into the socket while the bike is running, and then turn off the ignition for this senario to happen.