Are Car Key Batteries All the Same?
2 Answers
Car key batteries are generally different. Here is some relevant information: 1. Car key batteries are not universal; they usually have model numbers printed on them. Common battery models include 2032, 2025, 2016, 1632, 1620, and 1616. 2. You can replace the battery at any place that offers battery replacement services. Most car key batteries are button cells, which typically have a long lifespan. 3. Normally, the battery can last for more than three years. If you include the spare key, most car owners may not even use up the battery before changing their cars.
Last time I helped a friend replace their car key battery, I realized it's not as simple as it seems. The battery types used by different car brands can vary greatly. My old Toyota uses a CR2032 coin battery, but when we opened my friend's Honda key, it turned out to be a CR2025. What's even funnier is that his other BMW uses a CR2450. The sizes and voltages are different, so using the wrong one is not an option. Once, a relative forced a CR2032 into a CR2016 slot and ended up damaging the key's battery compartment. Now I've developed a habit when buying batteries: either open the old battery to check the model or refer to the vehicle manual. Some car keys even have chips, and improper handling during battery replacement might affect signal transmission.
