What is the battery model for the Buick Excelle car key?
3 Answers
The battery model is CR2032. 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 battery shape is cylindrical; if it is square, F is used instead; 20 indicates the battery diameter is 20mm; 32 represents 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, its lifespan will be significantly shortened. Domestic first-tier brand batteries can generally guarantee this lifespan. Under ideal usage conditions (sealed, room temperature, no moisture, etc.), the lifespan can be further extended 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 is used, the shorter the battery life will be. If the remote key battery runs out, you can directly use the mechanical key to open and start the vehicle. The batteries used in car remote keys are button batteries, mainly including models: CR2016, CR2025, CR2032, and CR2450. For the specific model used in each key, owners 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 voltage of this battery is 3V, while most car key batteries are powered by 9V, so all three batteries need to be replaced each time. Examples include Guangben, Toyota, Volkswagen, Mazda, etc. CR2016 specifications: battery diameter is 20mm, thickness is 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than CR2016. However, it is still used in some car keys. It is thicker than CR2016 but has a relatively higher storage capacity. CR2025 specifications: battery diameter is 20mm, thickness is 2.5mm. This type of battery is also commonly used in audio remotes. Button-type CR2032 battery: Its thickness is twice that of 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 material is lithium metal, and the electrolyte is a lithium battery. 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 models, it is thicker and larger, with a diameter of 24.5mm and a height of 5.0mm. The rated current value of CR2450 is 0.2mA, mainly used in low-power electronic products. Generally, the battery 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 of most small electronic products for light emission, sound, and RF output.
My old Buick Excelle uses a CR2032 coin battery, which is readily available at supermarkets and hardware stores. Replacing it yourself is super easy—just use a flathead screwdriver to gently pry open the small groove on the side of the key. The battery compartment has clear positive/negative markings, so be careful not to install it backward. When buying batteries, stick with Panasonic or Sony brands—off-brands often die in just three months, which is really frustrating. Last time I replaced it, I also wiped the key contacts with an alcohol swab, and now the buttons respond incredibly well. Quick reminder: Don’t toss the old battery randomly—most supermarkets have recycling bins for them.
The Buick Excelle car key uses a silver coin battery, model CR2032. Charging 80 yuan for a replacement at the 4S store is practically daylight robbery—you can get a Supermax battery at the supermarket for just 5 yuan. I once taught my neighbor how to replace it: pry open the clasp at the keyring position, use your fingernail to pop open the casing, and remember to place the battery with the positive side up. If you're worried about breaking it, a watch repair shop will do it for 10 yuan in labor, much more reasonable than an auto repair shop. Don’t leave your spare key in the car—running out of battery can really drive you crazy.
