The battery model is CR2025. It is a lithium manganese dioxide battery, named according to the IEC standard. Among them: C - indicates a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode; R - indicates that the shape of the battery is cylindrical, if it is square, F is used instead; 20 indicates that the diameter of the battery is 20mm; 25 represents the height of the battery is 2.5mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity ranges from 140-170mAh. CR2025 usually has a lifespan of 5 years. If the manufacturer's production level is not high or quality control is poor, its lifespan will be greatly shortened. Domestic first-tier brand batteries can basically guarantee this lifespan. If the usage environment is ideal (sealed, room temperature, no moisture, etc.), its lifespan can be further extended to 8 years or even 10 years. The usage time of the car remote key battery is closely related to the frequency of use. The more frequently it is used, the shorter the usage time will be. If the remote key battery runs out of power, you can directly use the mechanical key to open the car and start the vehicle. The batteries used in car remote keys are button batteries, mainly using three types of batteries: CR2016 and CR2025. For the specific model used on each model, the owner can refer to the battery model in the user manual for replacement. Button-type CR2016 battery: The usage rate of car key remotes is very high, making it one of the most common car remote batteries. The battery voltage of this type is 3V, and generally, car key batteries are powered by 9V, so each time the battery is replaced, three batteries need to be changed. Examples include Guangben, Toyota, Volkswagen, Mazda, etc. CR2016 specifications: battery diameter 20mm, thickness 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than CR2016. However, some car keys still use it. It is thicker than the 2016 model but has relatively higher storage capacity. CR2025 specifications: battery diameter 20mm, thickness 2.5mm. This type of battery is also commonly used in audio remotes. The utilization rate of CR2025 batteries is much lower than that of CR2016, mainly because this battery is thicker than CR2016, but its power storage capacity is better. During the use of car keys, key failures may occur, 50% of which are caused by key power failure.
