What is the battery model for the Baojun 730 remote 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 the 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 around 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 will be significantly shortened. Domestic first-tier brand batteries can generally 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 a vehicle 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 and start the vehicle. The batteries used in car remote keys are 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: The usage rate of car key remotes is very high, and it is almost 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 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, some car keys still use it. It is relatively thicker than CR2016 but has a 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 battery CR2032: 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 very stable manganese dioxide, the negative electrode material is lithium metal, and the electrolyte is a lithium battery. 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 battery CR2450: 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 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 production, and RF output.
I often enjoy tinkering with small car components. The battery model for the Baojun 730's remote key is usually CR2032, a common button cell battery that can be found in supermarkets or electronics stores for about 5 yuan each. Replacing it is super simple: use a small screwdriver to gently pry open the key shell (be careful not to scratch it), remove the old battery, and insert the new CR2032 with the positive side facing up. I've replaced it a few times myself and noticed the battery typically lasts one to two years before needing replacement—otherwise, the key becomes sluggish, causing delays when unlocking the car door. I recommend buying name-brand batteries like Duracell for better durability and less leakage, saving you frequent replacements. Avoid placing the key in high-temperature areas or stacking it with your phone to extend battery life. Regularly checking this small detail can prevent the embarrassment of being locked out of your car.
As a frequent driver, I find key battery issues easy to solve. The Baojun 730 remote key uses CR2032 batteries, and I bought a few spares on JD.com for just over ten yuan. When replacing the battery, I always watch tutorial videos first. The key shell can be pried open with a coin, and when replacing the old battery with a new CR2032, make sure the contacts are aligned properly. I remember the last time I replaced it, the key worked immediately, saving me the trouble of going to a repair shop. Now I've developed a habit of changing it every 18 months to ensure smooth keyless start. If the key occasionally doesn't respond, don't panic—try replacing the battery first, and you'll save unnecessary expenses. Learning these little tricks after buying a car is really worthwhile.
