My wife took delivery of 2021 MS LR in mid-November. She purchased, at the Tesla Store, a key fob case that has a metal frame. I am aware that this frame interferes somewhat with the signals that are sent by the fob to the car. Today that 2-month old key fob was totally ineffectual. I.e., apparently dead. So my question is: does that metal frame on the key fob case actually deplete the battery to zero in 2 months?