What is the battery replacement cycle for external tire pressure monitoring?
2 Answers
External tire pressure monitoring batteries typically last about two years, and the batteries can be replaced by the user themselves, allowing for reuse. Tire Pressure Monitoring: Tire pressure monitoring involves real-time automatic monitoring of tire pressure during vehicle operation, with alerts for tire leaks or low pressure to ensure driving safety. Common tire pressure monitoring methods include: Direct Tire Pressure Monitoring: Direct tire pressure monitoring devices use pressure sensors installed in each tire to directly measure tire pressure. The pressure information is transmitted wirelessly from inside the tire to a central receiver module, which then displays the tire pressure data for each tire. The system automatically alerts when tire pressure is too low or if there is a leak. Indirect Tire Pressure Monitoring: When the pressure in a tire decreases, the vehicle's weight causes the rolling radius of that wheel to become smaller, resulting in faster rotation compared to other wheels. By comparing the rotational speed differences between tires, the system monitors tire pressure. Indirect tire pressure alert systems essentially rely on calculating the rolling radius of the tires to monitor pressure. Tire Pressure Monitoring System (TPMS) Introduction: It combines the advantages of both systems mentioned above, equipping direct sensors in two diagonally opposite tires and incorporating a 4-wheel indirect system. Compared to using only a direct system, this hybrid system can reduce costs and overcome the indirect system's inability to detect simultaneous low pressure in multiple tires. However, it still cannot provide real-time data on the actual pressure in all four tires, as a direct system can.
As someone who has used three sets of external tire pressure monitoring systems, here's my real-world experience: The button batteries in external sensors typically need replacement every 6-12 months. Last time during a business trip, I got a sudden tire pressure alarm which turned out to be a false alarm caused by drained batteries. I've developed a habit of unscrewing the sensors with the provided tool every six months to check battery levels. Also, aged rubber sealing rings can allow rainwater to seep in and corrode the battery compartment - this is particularly easy to overlook. I recommend checking twice a year: before winter and after summer, since low temperatures significantly impact battery performance. Replacing them yourself is simple - just buy CR1632 batteries from a convenience store and it takes ten seconds, but avoid no-name brands as leaking batteries can damage the sensors.
