2 days ago the XF started kinda slow and the wing popped up. I drove around for about an hour with no problems. I jumped in it today and there was nothing. Absolutely nothing. No sound, no display, no clock. It was completely 100% dead.

The battery is just under 1 year old. It either is defective and shorting itself out, or there's a circuit somewhere drawing energy.

Update (yes it's taking 2 days to write this post) I had it on trickle charge while still in the car and it was still completely dead. I took it out to NAPA and their tester couldn't tell if it was good or not. It's currently at NAPA on their charger til 4pm. The brand name on the battery is "Werker".

What the H is going on with this?