Environmental temperature plays a significant role in determining functional battery lifespan for remote key fobs. Keeping remotes away from cold winter temperatures when parked can dramatically extend the charge held in coin cell batteries.
Heat Also Reduces Life
At the other extreme, leaving key fobs inside hot vehicles bakes the batteries – shortening their ability to hold sufficient voltage. Parking remotes on sunny dashboards also risks reduced capacity over time. Keeping keys in pants pockets or buried in hot purses produces the same negative effects.
Try Storing Remotes Indoors
Maintaining moderate room temperature surroundings whenever possible gives key fob batteries the best longevity. Indoor storage avoids shortening cell life through winter or summer temperature extremes. Any steps limiting environmental stress keeps coins cells operating reliably longer before replacement becomes necessary.