How Long Does a Car Smart Key Battery Last?

[McTimothy]

Car smart keys with keyless entry functionality typically last around three years, while those without keyless entry can last up to seven years. Here are the specific details about car smart key batteries: 1. With keyless entry function: Generally lasts about three years. The vehicle emits a radio frequency, and the smart key with keyless entry contains a one-to-one chip. When the vehicle's radio frequency identifies a matching chip signal, it allows unlocking or automatic unlocking. Since this involves a two-way matching process, the key must maintain a weak power consumption to ensure the chip emits a recognizable signal. Although the power consumption is minimal, it still affects battery life. 2. Without keyless entry function: Typically lasts around seven years. Keys without keyless entry do not need to continuously emit a chip signal; they only transmit a signal when the button is pressed. As a result, the battery in such remotes tends to last much longer.