What are the specifications for general car remote control batteries?
2 Answers
There are approximately ten types of batteries used in car keys. The most commonly used ones are 2032, 2025, 2016, 1632, 1620, 1616, etc. Generally, the model number is indicated on the battery. When replacing the battery, pay attention to the following two points: 1. For button-type CR2016 batteries, this type of battery is widely used in modern car key remotes. The voltage of such batteries is 3V. Most car keys require 9V, so when replacing the battery, you need to replace all three batteries together. 2. For example, remote controls for models like Honda, Toyota, Volkswagen, Mazda, etc., typically use CR2016-type batteries, with specifications as follows: battery diameter is 20mm, and thickness is 1.6mm.
I've driven quite a few cars, and every time the remote runs out of battery, it needs replacement. Most of them use CR2032 coin cells, with a diameter of about 20mm, thickness of 3.2mm, and voltage of 3 volts. Don't underestimate this little thing—getting the wrong model might cause the remote to malfunction or even display garbled signals. From my experience with different car models, Japanese cars often use CR2016 or CR2032, while European cars occasionally use CR2025, so it's best to check the number on the old battery first. Replacing it yourself is super easy—just pry open the remote shell with a coin, pop in the new battery, and make sure not to reverse the polarity, or you might fry the circuit. They usually last a year or two, so I keep a few spares at home to save money and hassle. A quick tip: there are lots of fakes online, so stick with trusted brands like Panasonic or Sony—they're durable and shockproof, saving you the headache of losing signal halfway through a trip.
