What is the battery model for the Envision car key?
2 Answers
The battery model is CR2032. It is a lithium manganese dioxide battery, named according to the IEC standard. Here's the breakdown: C - Indicates a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode; R - Indicates the battery shape is cylindrical; if square, F is used instead; 20 - Indicates the battery diameter is 20mm; 32 - Indicates the battery height is 3.2mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity is approximately 200mAh. CR2032 typically has a lifespan of 5 years. If the manufacturer's production level is low or quality control is poor, the lifespan may be significantly shortened. Domestic first-tier brand batteries can generally guarantee this lifespan. Under ideal conditions (sealed, room temperature, no moisture, etc.), the lifespan can extend to 8 years or even 10 years. The usage time of a car remote key battery is closely related to the frequency of use—the more frequently it's used, the shorter the lifespan. If the remote key battery runs out, you can use the mechanical key to open and start the vehicle. Car remote keys use button batteries, mainly three types: CR2016, CR2025, and CR2032. For the specific model used in each vehicle, owners can refer to the battery model in the user manual for replacement. Button-type CR2016 battery: This is one of the most commonly used car remote batteries. The battery voltage is 3V, while most car key batteries are powered by 9V, so three batteries need to be replaced each time. Examples include Honda, Toyota, Volkswagen, Mazda, etc. CR2016 specifications: battery diameter 20mm, thickness 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than CR2016, but some car keys still use it. It is thicker than CR2016 but has a relatively higher storage capacity. CR2025 specifications: battery diameter 20mm, thickness 2.5mm. This type of battery is also commonly used in audio remotes. Button-type CR2032 battery: It is twice as thick as CR2016. The 3V-CR2032 lithium manganese battery belongs to the lithium-manganese dioxide structure. The positive electrode material is chemically stable manganese dioxide, the negative electrode is lithium metal, and the electrolyte is a lithium battery solution. The main components of the electrolyte are dimethoxyethane, propylene carbonate, and lithium perchlorate. Its shape resembles a button, hence the name button lithium battery or lithium manganese button battery. Button-type CR2450 battery: Compared to the other three, it is thicker and larger, with a diameter of 24.5mm and a height of 5.0mm. The rated current value for CR2450 is 0.2mA, mainly used in low-power electronic products. Generally, such batteries can provide an output current of 0.001mA to 5mA, with a continuous output current of up to 15mA and a flash output current of up to 30mA, meeting the requirements for light emission, sound, and RF output in most small electronic products.
I've been driving the Enclave for several years and remember that the key fob uses a small CR2032 coin cell battery, which is quite common and can be easily found in supermarkets or hardware stores. The battery typically lasts one to two years, depending on usage frequency—like frequent door unlocking can drain it faster. Replacing it is pretty straightforward: just pry open the back cover of the key fob, gently remove the old battery (mind the polarity), and insert the new one. I usually keep a few spare batteries in the car to avoid emergencies. When the key starts acting up, it’s often a sign the battery is dying—don’t rush to replace the entire key assembly; try swapping the battery first—it might just fix the issue. Also, avoid cheap batteries; low-quality ones tend to leak and could damage the key, which isn’t worth the risk.
