How long do the coin cell batteries in our favorite car keys last? How do you think a car key could die? How do I replace the coin cell battery?

It is really inconvenient to take out the button battery and measure it with an ammeter before disassembling the key. It is better to judge directly based on the reaction of the car and the key. For example, if your car key can only be very close to you, you can drive, or even Sometimes there is no response when I go to the car all morning. Apart from clearing the signal interference, it means it is out of battery.

The button battery in the car key may last for more than a year, mainly depending on the frequency of use. Some friends do not drive often, or they do not open and close the car door frequently, so there will be no problems for 23 years.

At the same time, we can judge by the signal lights. Usually, when we use the signal lights, they are very bright, and after the power is turned off, they are almost faint. If you really can't see anything, you will find that after installing a new battery, the car The red light emitted by the key is very dazzling.

It is also important to remove the button battery. At least a thick piece of iron or a blade is needed. If there are screws, a small screwdriver is also needed. We will first pull out the hidden part.

Then insert the knife into the gap and cut it in one direction. Don't push too hard, just slide it through. Remember the positive and negative poles when pulling out the battery, then replace the new battery with a gourd-shaped battery and secure it.