What is the battery model for the new Passat key?
2 Answers
The battery model for the Passat key is CR2032. CR2032 is a lithium manganese dioxide battery, named according to the IEC standard. The breakdown 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 a cylindrical battery shape; if it were square, F would be used instead. 20 - Indicates the battery diameter is 20mm. 32 - Represents the battery height of 3.2mm. The nominal voltage is 3.0V, with an endpoint voltage of 2.0V. The rated capacity varies between 200-240mAh, depending on the manufacturer's quality. The shelf life of a CR2032 is typically 5 years. However, if the manufacturing level is low or quality control is poor, its lifespan can be significantly shortened. Domestic first-tier brand batteries can generally guarantee this lifespan. Under ideal conditions (sealed, room temperature, no moisture, etc.), the lifespan can extend further, 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 lock button on the side of the smart key to release 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. Insert the new battery, then reattach the battery cover and mechanical key to complete the replacement.
As a long-time Volkswagen owner, let me tell you that the key fob battery for the new Passat is typically CR2032, the most common button cell battery. I've replaced it myself for my 2022 Passat - just buy a CR2032 from the supermarket for two yuan each and you're good to go. The replacement process is simple: open the key fob, gently pry open the back cover with a small tool, note the positive/negative positions when removing the old battery, and install the new one with the positive side facing up. It takes about a minute if you're quick, saving you unnecessary mechanic fees. If the key doesn't respond, the battery might be loose or the contacts dirty - just clean them with a cotton swab. Replacing the battery annually prevents malfunction, especially during cold winters when battery life shortens. Keeping spare batteries in the glove box is practical. In short, DIY is both convenient and cost-effective.
