Subaru key fobs, like those of other modern vehicles, rely on batteries to operate their remote locking, unlocking, and ignition systems. Many Subaru owners occasionally face the inconvenience of a dead key fob battery. Understanding the reasons behind battery depletion and adopting proactive measures can significantly enhance the lifespan and reliability of your Subaru key fob battery.
Factors Affecting Subaru Key Fob Battery Life
Several factors can contribute to the battery drain in your Subaru key fob. Recognizing these elements is the first step toward optimizing battery life.
Battery Quality and Manufacturing
The quality of the CR2032 coin battery itself plays a crucial role. Not all batteries are manufactured to the same standards. Variations in quality control can lead to some batteries failing sooner than others. Even within reputable brands, a defective battery can occasionally slip through quality checks. If you have a battery tester, it’s advisable to check a new battery before installation to ensure it’s within the expected voltage range.
Usage Habits: Excessive Button Pressing
Frequent and unnecessary pressing of the key fob buttons, especially from a distance, can accelerate battery discharge. Some users develop a habit of repeatedly pressing the lock or unlock buttons as they approach or leave their vehicle. This practice consumes battery power more rapidly compared to using the key fob features judiciously.
Proximity to Vehicle: Constant Communication
Keeping your key fob in close proximity to your Subaru vehicle for extended periods can also contribute to faster battery drain. There’s evidence suggesting that continuous communication between the fob and the vehicle, even when idle, can deplete both the vehicle’s and the fob’s batteries over time. Ideally, store your key fob away from your vehicle when at home or in situations where the vehicle is parked for a prolonged duration. Faraday boxes are also available, which can block the signal from the key fob, preventing unnecessary communication with the vehicle.
Tips to Maximize Subaru Key Fob Battery Life
To mitigate battery drain and extend the life of your Subaru key fob battery, consider these practical tips:
Choose Reputable Battery Brands
Opt for batteries from well-known and trusted brands like Energizer or Duracell. While Panasonic batteries are also considered high quality, ensure you are purchasing genuine products, especially when ordering online. Investing in quality batteries can reduce the likelihood of premature failure due to manufacturing defects.
Utilize Touch and Proximity Features
Subaru vehicles equipped with touch-sensitive door handles and proximity unlocking offer a battery-saving alternative to button presses. Engage these features to lock and unlock your vehicle whenever possible. This reduces reliance on button activation and conserves battery power in the long run.
Store Key Fob Away from the Vehicle
When at home or work, store your Subaru key fob at a distance from your vehicle. This minimizes constant signal exchange and allows both the vehicle and the key fob to enter a low-power “sleep” mode, preserving battery life in both devices. Consider using a Faraday box or pouch for key fob storage to completely block signals and prevent unintentional vehicle communication.
Conclusion
By understanding the factors that impact Subaru key fob battery life and implementing these simple preventative measures, you can significantly extend the operational period of your key fob battery. Regularly monitoring your key fob’s performance and being mindful of usage habits will ensure reliable access to your Subaru and minimize the inconvenience of unexpected battery replacements. Remember to also check your physical emergency key to ensure it functions correctly as a backup entry method.
