05/30/2026
ONE STOP AUTO STORE
How Range Drops Over a Fob's Lifespan
Fresh Battery (3.0V – 3.3V): You get the maximum factory range. Depending on the vehicle brand, this allows you to lock, unlock, or remote-start your car from 60 to over 300 feet away.Draining
Battery (2.7V – 2.9V): The signal weakens significantly. You will notice you have to get much closer to the vehicle—often within 10 to 15 feet—for the doors to respond. Remote start features usually stop working entirely at this stage to preserve enough power for basic unlocking.
Critically Low Battery (Below 2.7V): The range drops to zero. The vehicle will only respond if you are standing directly next to the driver's door, or you may have to resort to using the physical emergency key blade.