What is the battery model for Volkswagen Golf car key?
2 Answers
The battery model for Volkswagen Golf car key is CR2025. CR2025 is a lithium manganese dioxide battery, named according to the IEC standard. The naming convention is as follows: 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. If it were square, it would be denoted by F; 20 - Indicates the battery diameter is 20mm; 25 - Represents the battery height of 2.5mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity ranges from 140-170mAh. The shelf life of a CR2025 battery is typically 5 years. However, if the manufacturer's production standards are low or quality control is poor, the lifespan can be significantly reduced. Domestic first-tier brands can generally guarantee this lifespan. Under ideal conditions (sealed, room temperature, no moisture, etc.), the lifespan can extend up to 8 or even 10 years. Generally, replacing a car key battery involves the following three steps: Step 1: Remove the mechanical key. Press the latch on the side of the smart key to remove the mechanical key. Step 2: Open the battery cover. After removing the mechanical key, you will see a deep slot and a shallow slot at the top of the smart key. The deep slot is for the keyhole, while the shallow slot is used to open the battery cover. Insert the mechanical key into the shallow slot and pry it open to reveal the coin battery. Gently remove the battery. Step 3: Replace the battery. Install the new battery, reattach the battery cover, and reinsert the mechanical key to complete the battery replacement.
I've driven a Golf for many years and have replaced the key battery several times. I remember the battery model is CR2032, which is a common button cell battery easily found in supermarkets. The replacement process is simple: first pry open the key casing, usually by pressing a small button or using a coin to pry the edge, then remove the old battery, being careful not to lose small parts. When installing the new battery, place it with the positive side facing up and ensure good contact. Key batteries typically last about one to two years, depending on usage frequency. If you're unsure about the model, check the owner's manual or ask a 4S store employee—don't guess blindly. It's advisable to keep a spare battery in the car for quick replacement without delay. Routine maintenance also includes cleaning the key slot to prevent dust from affecting the signal. I once replaced it myself in less than five minutes, saving on repair shop costs.
