What is the battery model for car remote keys?
2 Answers
There are three commonly used battery models for car remote keys: the CR2016 button-type battery, the CR2025 button-type battery, and the alkaline 12V battery. CR2016 button-type battery: This is one of the most widely used car remote batteries today, with a very high usage rate in car key remotes. The voltage of this battery is 3V, while car key batteries generally operate at 9V, so three batteries need to be replaced each time. The specifications of the CR2016 model are: battery diameter of 20mm and thickness of 1.6mm. CR2025 button-type battery: This model is much less commonly used than the CR2016. However, it is still used in some car keys. It is thicker than the 2016 model but has a relatively higher energy storage capacity. The specifications of the CR2025 model are: battery diameter of 20mm and thickness of 2.5mm. Alkaline 12V battery: This type is mostly used in early car key remotes and electric rolling shutters for stores. It is characterized by its small size, high output voltage, and longer remote control distance.
Last month, I encountered an issue where my car key couldn't unlock the door, and it turned out the battery was dead. Most remote keys use a CR2032 coin cell battery, which looks like a small coin. I opened the key myself to check—the model number is usually printed on the old battery or inside the key casing. Replacing it is simple: gently pry open the back cover of the key with a coin, remove the old battery, insert a new CR2032 (make sure the positive and negative sides aren't reversed), and snap the cover back on. If you're unsure, you can visit an auto parts store to buy the correct model. Different car models may vary—for example, older Fords sometimes use CR2025, while Toyotas commonly use CR1632—so be sure to confirm the exact type. I always keep a few spare batteries in my car to avoid wasting time in emergencies.
