Car key still not working after battery replacement?

[McKendra]

If the car remote control does not work after replacing the battery, you should check whether the battery has power, and it may also be incorrectly positioned. Here is additional information: 1. When replacing the battery in a car remote control, not only should you pay attention to whether the battery has power, but also whether it is installed correctly. If these aspects are fine but the remote still doesn't work, you may need to consider the issue of matching. Some car models have higher requirements for remote control batteries, and replacing the battery may require matching, such as with Peugeot. 2. The internal circuitry of the key is actually quite weak against impact and can easily be damaged by severe collisions. Another possibility is water damage—if water seeps inside and burns out the circuits, it can also cause the remote to malfunction. If the remote key gets wet, do not shake it vigorously or press any buttons, as this can cause water to seep into other critical circuits. Also, avoid using the remote to unlock the car immediately, as this may lead to circuit board damage.