09/18/2026
The keys never left the hook by the door. The car kept asking for them anyway.
A keyless-entry fob is not sitting quietly in your hallway doing nothing. It is listening for a low-frequency wake-up signal that your parked car sends out over and over again, and whenever the two are close enough to hear each other, the fob answers, the car answers back, and that handshake repeats all night long while you sleep. A CR2032 cell rated by its manufacturer to last three to five years can be flattened in under twelve months by nothing more dramatic than where you decided to hang your keys.
Carmakers know about this and started engineering around it. Ford began fitting motion-sensing fobs that shut their radio down after roughly 40 seconds without any movement, and several other manufacturers have since done the same thing. If your fob is older than that, distance is the only defense you have, so move the hook to an interior wall, a kitchen drawer or an upstairs room and put a solid 30 or 40 feet between your keys and your driveway.
There is a second reason to move them, and it is considerably worse than a dead battery. Relay theft works by standing one person at your front door with an amplifier that picks up the signal your car is broadcasting and forwards it to a partner waiting beside the vehicle with a receiver. Your fob, sitting on that hook, politely answers a car it has been fooled into thinking is parked right beside it. The doors unlock, the engine starts and the car is driven away in well under a minute, with no broken glass, no alarm and nothing for a neighbor to notice.
A Faraday pouch costs about $10 and blocks the signal completely, and an ordinary metal cookie tin with a tight lid does the same job for free. Test whichever one you pick before you trust it: put the fob inside, close it properly, walk out to the car and pull the handle, and if the door opens then the shielding is not doing its job. Get this right and one small habit pays you twice over. The battery lasts its full three to five years, and the easiest car theft method in the country simply stops working on your driveway.