How often should the car key battery be replaced?

[Faith]

Car key batteries should be replaced every 2 to 3 years. The replacement method is as follows: 1. Prepare the key battery, car key, and a flat-head screwdriver; 2. There is a round button on the side of the car key. Press this button and pull out the mechanical key; 3. Locate the side where the battery is installed, find the opening slot, and use a flat-head screwdriver or the mechanical key to open it; 4. After opening the shell, carefully remove the old battery, place the new battery in, and reassemble in the reverse order. A car key is a tool for switching the car on and off. Modern car keys use chips, which are part of a magnetic chip system. The reading coil in the car's ignition lock cylinder will read the chip in the key, as each chip contains fixed digital information.