A year old battery could be bad, and the only way to know is by checking it. Start by testing the static voltage, and then see what happens when you try to start it. If the battery tests ok, then do additional electrical testing at the starter relay, in order to find out what the actual problem is. Or you can just go ahead and hang on another starter - your vehicle, your choice.
2011 3i 2.0 A/T 145K miles