Over the last few days I’ve noticed slightly odd behaviour from my lights - they don’t always turn on when I unlock the car and also the internal light hasn’t been turning on when I open the door. I wasn’t sure what was going on until just now I got a low battery warning come up - never seen that before. I haven’t been sitting in the car without the engine on as it’s too cold so it couldn’t be low from usage without the engine. This seems a bit strange on a car that is 2 years old so is it possible my battery could need changing already? Is it covered by warranty?