What is the battery model for Mazda CX4 car key?
3 Answers
The battery model for Mazda CX4 key is CR1620. CR1620 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; 16 indicates that the diameter of the battery is 16mm; 20 represents the height of the battery is 2.0mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity ranges from 140-170mAh. The shelf life of CR1620 is usually 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. Generally, replacing the car key battery only requires the following 3 steps: Step 1: Remove the mechanical key. Press the lock buckle on the side of the smart key to remove the mechanical key. Step 2: Open the battery cover. After removing the mechanical key, you can see a deep groove and a shallow groove at the top of the smart key. The deep groove is the keyhole, and the shallow groove is used to open the battery cover. Insert the mechanical key into the shallow groove and pry it outward with force to open the battery cover. After opening, you can see the button battery. Gently pry it, and the battery will come out. Step 3: Replace the new battery. Install the new battery, then reattach the battery cover and mechanical key in sequence, and the key battery replacement is completed.
Last time my CX-4 key fob ran out of battery, I specifically checked - most model years use CR2025 coin cells. Opening the key shell is simple: after extending the key blade, you'll notice a small notch on the side. Just wedge a coin in and twist to open. Remember to install the new battery with the positive side (the side with markings) facing upward. I recommend keeping two spare batteries at home - this type isn't available at convenience stores, but auto parts shops or online retailers sell them very cheaply. Pro tip: wipe the metal contacts in the battery compartment with a cloth before reassembly to prevent poor connectivity. I changed mine DIY - the whole process took 2 minutes, saving over 100 yuan in labor fees compared to visiting the dealership.
As a seasoned car owner who handles keys daily, the CX-4 key battery depends on the specific model year. Early models use CR2025, while newer ones reportedly switched to CR2032. Open your key fob to check – the battery model is printed directly on it. Avoid using metal tools to pry the key seam; last time I saw a mechanic effortlessly pop it open with a plastic pry tool. Pay attention to battery orientation during installation, and test the lock button sensitivity afterward. These batteries may not be available in supermarkets, but watch repair shops or JD.com self-operated stores stock them for just 7-8 yuan. If issues persist after replacement, the key circuit board may have moisture damage.
