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What is the battery model for Toyota car keys?

1 Answers
DaisyRose
07/29/25 6:56pm
The original remote car key batteries for Toyota Highlander, Corolla, Crown, RAV4, and Camry are CR2032. For Toyota Leiling, Highlander, and Corolla, the original remote car key battery is CR1620. These are lithium manganese dioxide batteries, named according to IEC standards. The naming convention 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 the battery shape is cylindrical. If it were square, it would be denoted by F. 20 - Indicates the battery diameter is 20mm. 32 - Indicates the battery height is 3.2mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity is approximately 200mAh. CR2032 batteries typically have a lifespan of 5 years. If the manufacturing quality is poor or quality control is lacking, the lifespan may be significantly shorter. Domestic first-tier brands can generally guarantee this lifespan. Under ideal conditions (sealed, room temperature, no moisture, etc.), the lifespan can extend to 8 or even 10 years. The usage time of a car remote key battery is closely related to the frequency of use. The more frequently it is used, the shorter the lifespan. If the remote key battery runs out, the mechanical key can be used to open and start the vehicle. Car remote keys use button batteries, primarily in models such as CR2016, CR2025, CR2032, and CR2450. The specific model for each key can be found in the user manual for replacement. Button-type CR2016 battery: This is one of the most commonly used remote key batteries. The battery voltage is 3V, and most car key batteries are powered by 9V, so all three batteries must be replaced each time. Examples include Honda, Toyota, Volkswagen, and Mazda. CR2016 specifications: battery diameter is 20mm, thickness is 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than CR2016, but some car keys still use it. It is thicker than CR2016 but has a relatively higher storage capacity. CR2025 specifications: battery diameter is 20mm, thickness is 2.5mm. This type of battery is also commonly used in audio remotes. Button-type CR2032 battery: Its thickness is twice that of CR2016. The 3V-CR2032 lithium manganese battery belongs to the lithium-manganese dioxide structure. The positive electrode material is chemically stable manganese dioxide, the negative electrode is lithium metal, and the electrolyte is a lithium battery. The main components of the electrolyte are ethylene glycol dimethyl ether, propylene carbonate, and lithium perchlorate. Its shape resembles a button, hence the name button lithium battery or lithium manganese button battery. Button-type CR2450 battery: Compared to the other three, it is thicker and larger, with a diameter of 24.5mm and a height of 5.0mm. The rated current value for CR2450 is 0.2mA, mainly used in low-power electronic products. Generally, these batteries can provide an output current of 0.001mA to 5mA, with a continuous output current of up to 15mA and a flash output current of up to 30mA, meeting the requirements of most small electronic products for light, sound, and RF output.
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