My wife went to drive our 2018 PHEV Niro and when she pushed the power button the display said "key not detected" Then everything went dead. I got out the spare key fob and no response, the car was still dead. I then jump started it, drove it around a little and everything seems to work fine now so far. Could leaving the key in the car when not in use drain the battery?? We live in a rural area so we think it remote for anyone to jack our car if we left the keys in it unlocked.