Bike = 2014 ST, SE5 Limited
Purchased bike last fall with only 630 miles on it.

Gremlin #1
Took off yesterday to go somewhere. Got to the destination, Shut the bike off, popped the frunk, pulled the key to get into the saddle bags, MP3 player kicked in for what I would say - 30 seconds and shut off.
Keys pulled, no power for the MP3 player to come thru the speakers. Weird. This has happened with the radio on hubby's 2015 RT a couple times also. No key in the bike!
Gremlin #2
Had to go back out to my bike to put something back into my frunk, I could here a faint, but sharp squeal, humming noise coming from the bike. Sounded loudest up by the frunk.
Not the first time this has happened. I've heard this a time or two when I have been washing the bike. Everything is off and usually the key pulled.
Could something be draining off the battery even with the key shut off and out?
I always pull the plug on the MP3 players when I'm not riding.
Gremlin #3
Key back in the ignition and had turned the key to pop the frunk, plugged in and started up the MP3 player, shut the trunk, turned the key on to get to the start, put music to AUX. Bike not started yet, but listening to the tunes and some people come up to me and ask questions about the bike. Shortly later, the MP3 player quit, so I just thought the battery in the MP3 player died. People left shortly after the tunes stopped, jumped on the bike and nothing. Nothing would light up. I had been visiting for about 15 minutes. That shouldn't be enough to the drain a battery. I carry jumpers with me, so I had a friend jump my bike. Got home, shut if off, and fired it back up again just to see if it would. Fired up. Threw it on the tender until it showed full charge again.

Any feedback of what could cause this. Everything on my bike is stock, except for me plugging in the MP3 player. Thanks for letting me bend your ear!