R56 Cooper S JCW - Won't hold a charge / Blue Smoke upon startup
 

Hello everyone,
I've got a 2009 Cooper S JCW and it seems to suddenly not hold a charge. I've had it for a little over a year now and I nothing has changed with the car except it's ability to startup without help (I have a USB jumper). I had the battery checked and it came back as fine, so I'm thinking it's the alternator. Does anyone has suggestions/ ways of tracking down a power draw?