What is the battery model for the Mercedes-Benz C200 key?
2 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 is cylindrical in shape, with F used as a substitute if it is square; 20 indicates that the battery diameter is 20mm; 32 represents the battery height of 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 not high or quality control is poor, its lifespan may be significantly shortened. Domestic first-tier brand batteries can generally guarantee this lifespan. Under ideal usage conditions (sealed, room temperature, free from moisture, etc.), the lifespan can be further extended to 8 years or even 10 years. The usage time of a vehicle 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 of power, the mechanical key can be used directly to unlock the vehicle and start the engine. The batteries used in car remote keys are button cells, mainly including the following models: CR2016, CR2025, CR2032, and CR2450. For the specific model used in each key, the owner can refer to the battery model in the user manual for replacement. Button-type CR2016 battery: This is one of the most commonly used remote key batteries. The battery voltage is 3V. Since most car key batteries are powered by 9V, all three batteries need to be replaced each time. Examples include: Guangben, Toyota, Volkswagen, Mazda, etc. CR2016 specifications: battery diameter of 20mm and thickness of 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than that of CR2016, but it is still used in some car keys. It is thicker than CR2016 but has a relatively higher storage capacity. CR2025 specifications: battery diameter of 20mm and thickness of 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 metallic lithium, and the electrolyte is a lithium battery electrolyte. The main components of the electrolyte are ethylene glycol dimethyl ether, propylene carbonate, and lithium perchlorate. It is shaped like 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. It is 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 production, and RF output.
The battery model for my Mercedes-Benz C200 key is a CR2032 coin cell. As a DIY-savvy car owner, I've replaced it several times because these batteries tend to run out after a few years, making the remote door unlock unreliable. Getting a CR2032 is easy – just a few bucks at Walmart or auto parts stores. When replacing, gently pry open the key casing with a small screwdriver, being careful not to damage the plastic parts. After removing the old battery, note the polarity and insert the new one correctly before snapping the case shut – the whole process takes under two minutes. I also recommend keeping a spare battery in the car to avoid being stranded by sudden failure. Key battery maintenance is crucial; checking it every two years prevents minor hassles. After all, details matter with Mercedes – no need to waste money on dealership fixes. Monitor your remote's responsiveness regularly and replace the battery early if it starts lagging.
