Key battery empty

[emax]

I've just changed the battery, it is a CR2032.

The new battery is at 3.24 Volts. But the voltage of the original battery is with 3.11 Volts still above the rated voltage of 3V.

So I wonder why the car complained.

 

[Tom109]

I set my alarm off by jacking the vehicle up when locked

I did the same, didn’t even get a wheel off the ground.