1, button CR20 16 battery
At present, the use rate of car key remote control is very high, and it is almost one of the most common car remote control batteries. The battery voltage of this kind of battery is 3V, and the general car key battery is 9V, so three batteries should be replaced every time the battery is replaced. Such as: Guangben, Toyota, Volkswagen, Mazda, etc. CR20 16 specification: the battery is 20mm in diameter and 1.6mm in thickness.
2. Button type CR2025 battery
Its utilization rate is much lower than that of CR20 16. But there are still some car keys that will be used. The thickness is relatively thicker than 20 16, but the storage capacity is relatively high. CR2025 battery has a diameter of 20 mm and a thickness of 2.5 mm, which is also commonly used for audio remote control.
3. button cell CR2032
The voltage is 3V, but the capacity is about 200mah, so the thickness is twice that of CR20 16.
3V CR2032 lithium-manganese battery belongs to lithium-manganese dioxide structure. The cathode material is manganese dioxide with very stable chemical properties, the cathode material is metallic lithium, and the electrolyte is lithium battery. The main components of electrolyte are ethylene glycol dimethyl ether, propylene carbonate and lithium perchlorate, which are shaped like buttons, referred to as button lithium battery or lithium manganese button cell.
Solution to the problem of dead car keys.
Don't worry if the car keys are dead. Generally, there is a spare mechanical key in the remote control key. Some buttons pop up automatically, and some need to press the hidden button to open the back cover and take it out. After taking it out, you can find the keyhole on the door and open the door. However, the keyhole of many models is hidden now, so you need to pry the protective cover gently with a key to find it, or open the handle.
If the car key is dead, the owner can repair it himself. At this time, you can manually change the key, pry open the shell with a mechanical key, slowly pull out the key core, and then replace the battery of the same model. The damage of the key may also be put together with digital devices such as mobile phones and ipad for a long time, which will lead to the gradual failure of electromagnetism, high temperature exposure and water ingress.