So my 2nd key (one that didn't get replaced under warranty, but had battery replaced at the same time) is now saying to me that its low on battery. Only after a few months.. I think its got to do with that smart lock thingy because i realised that if u turn ur car off and just sit in the car for awhile then the key actually communicates with the car every like 5 seconds. U'll see a little red flash from the remote. Which begs the question that is it in fact draining the battery? I do often sit in the car with the car turned off just chatting to my mates and stuff so that could be the case..

Worth noting... DO NOT SIT IN UR CAR WHEN ITS TURNED OFF, IT CAN DRAIN THE BATTERY lol