Browse
For Sale
Antiques CollectiblesApparelBaby Kids ItemsBooks， Movies And MusicElectronicsFree StuffGarden OutdoorHealth BeautyHome GoodsHome Improvement SuppliesMusical InstrumentsOffice SuppliesPet SuppliesSporting GoodsTicketToys GamesTransportationOthers
Jobs
AccountingAdministration & Office SupportAdvertising， Arts & MediaBanking & Financial ServicesCall Center & Customer ServiceCEO & General ManagementCommunity Services & DevelopmentConstructionConsulting & StrategyDesign & ArchitectureEducation & TrainingEngineeringFarming， Animals & ConservationGovernment & DefenseHealthcare & MedicalHospitality & TourismHuman Resources & RecruitmentInformation & Communication TechnologyInsuranceLegalManufacturing， Transport & LogisticsMarketing & CommunicationsMining， Resources & EnergyReal Estate & PropertyRetail & Consumer ProductsSalesScience & TechnologySelf EmploymentSport & RecreationTrades & ServicesOther
Property
BuyRent
Cars
Used CarsNew CarsOthers
Services
BusinessCraftsDesign And WebEventsHome ImprovementLegalLessonsPersonalPetsPhotographyRepair And Technical SupportWellnessWriting， Translation， And TranscriptionOthers
Community
Activities & GroupsArtists & MusiciansClasses & LessonsEventsFriendship & NetworkingLost & FoundRideshareSports TeamsVolunteersTravel & Travel PartnersSkills & Language SwapOther

What is the battery model for the Audi A3 car key?

2 Answers
DeHolden
07/29/25 3:55am
The battery model is CR2032. It is a lithium manganese dioxide battery, named according to the IEC standard. Among them: C- indicates a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode; R- indicates that the battery is cylindrical in shape, with F replacing it if it is square; 20 indicates that the battery has a diameter of 20mm; 32 represents a battery height of 3.2mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity is approximately 200mAh. CR2032 typically has a lifespan of 5 years. If the manufacturer's production level is not high or quality control is poor, its lifespan can be significantly shortened. Domestic first-tier brand batteries can generally guarantee this lifespan. If the usage environment is ideal (sealed, room temperature, free from moisture and other interferences), its lifespan can be further extended to 8 years or even 10 years. The usage time of a vehicle remote key battery is closely related to the frequency of use. The more frequently it is used, the shorter its lifespan will be. If the remote key battery runs out of power, the mechanical key can be used directly to open the vehicle. Car remote keys use button batteries, mainly three types: CR2016, CR2025, and CR2032. For the specific model used in each case, car owners can refer to the battery model in the user manual for replacement. Button-type CR2016 battery: The usage rate of car key remotes is very high, making it one of the most common remote batteries. The voltage of this battery is 3V, while most car key batteries are powered by 9V, so three batteries need to be replaced each time. Examples include Guangben, Toyota, Volkswagen, Mazda, etc. CR2016 specifications: battery diameter 20mm, thickness 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than CR2016. However, some car keys still use it. It is thicker than the 2016 model but has a relatively higher storage capacity. CR2025 specifications: battery diameter 20mm, thickness 2.5mm. This type of battery is also commonly used in audio remotes. Button battery CR2032: 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 material is lithium metal, and the electrolyte is a lithium battery electrolyte. The main components of the electrolyte are ethylene glycol dimethyl ether, propylene carbonate, and lithium perchlorate. It is shaped like a button, hence the name button lithium battery or lithium-manganese button battery.
Was this review help?
6
4
Share
AustinRose
08/12/25 7:41am
The battery model for the Audi A3 car key is typically CR2032, a standard 3-volt coin cell battery, chosen for its compact size, stable voltage, and ability to support the smart key's remote functions. I often replace this type of battery myself, avoiding unnecessary trips to the dealership—just use a coin to gently pry open the key casing, carefully remove the old battery, and align the new battery with the correct polarity. Don’t forget to check if the battery compartment has good contact, otherwise the key may malfunction; I recommend using Energizer or Duracell brands for their reliable quality, lasting two to three years, and avoiding counterfeit products online. Regularly replacing the battery also prevents sudden power loss, which could affect unlocking or the anti-theft system.
Was this review help?
8
2
Share
Expand All
More Forum Discussions

Can the Volkswagen Daytime Running Lights Be Turned Off?

Volkswagen daytime running lights can be turned off. The method to turn them off is as follows: Use the left turn signal lever to activate the left turn signal, then pull the high beam lever and hold it. Next, insert the key and turn it to the 'on' position without starting the engine. Wait for 4 seconds, and you will hear a 'ding' prompt sound, indicating that the daytime running lights have been turned off. The purpose of daytime running lights: Daytime running lights primarily enhance the visibility of the vehicle during the day, making it easier for oncoming vehicles or pedestrians to notice. Many people believe that daylight is sufficient and that daytime running lights are unnecessary. However, there are many situations during the day that can affect a driver's visibility, such as rain, snow, or haze, which can reduce the ability to see distant objects and lower visibility. In these cases, daytime running lights can play a significant role by informing other vehicles or pedestrians of the vehicle's exact position, thereby reducing the likelihood of accidents. Notes on daytime running lights: As the name suggests, daytime running lights are meant to be used during the day. Normally, these lights do not need to be manually turned on by the driver; they automatically activate when the engine starts, unless they have been modified aftermarket. When the headlights are turned on, the daytime running lights will automatically turn off or dim. Additionally, there is no indicator on the dashboard to show that the daytime running lights are on.
11
2
Share

Is CYS color change film domestically produced or imported?

CYS color change film primarily uses imported raw materials. Imported base paper and adhesive: The base paper and adhesive are directly imported from Europe and America. The original film material comes from German factories, and most special-effect color pigments are also purely imported products. The adhesive used in CYS color change film is entirely imported, making CYS the only brand in China's color change film market that uses purely imported adhesive. Color processing and adhesive application done domestically: Considering product development speed and production efficiency, CYS conducts color processing and adhesive application domestically to ensure product quality, faster time-to-market, and higher cost-performance ratio.
20
2
Share

What does the highway ETC refer to as a system?

ETC is an electronic toll collection system without stopping, also known as an automatic road toll system. It is a road toll method specifically used for toll roads, commonly seen on highways, bridges or tunnels implementing toll policies, and some sections of the city center, to alleviate urban traffic congestion. According to the regulations of the State Council, starting from 2020, vehicles without ETC cannot enjoy toll discounts. In the future, only one manual lane will be retained at highway toll stations, and tolls can only be paid through manual channels. Additionally, newly installed ETC cannot be used on highways immediately; the ETC device needs to be activated before normal use. During free holiday periods, highways can still be used. For users who have already installed ETC, passing through ETC lanes will not incur charges. ETC deduction principles: There will be one or more ETC lanes on highways. Through dedicated short-range microwave communication between the vehicle-mounted electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at the toll station, and using computer networking technology for backend settlement with banks, the purpose of paying road and bridge tolls without stopping at toll stations is achieved. All of this is based on the principle of passing first and deducting fees later. Benefits of installing ETC: Time-saving: Eliminates the hassle of queuing and waiting; Green and environmentally friendly: Green and low-carbon, vehicles pass through toll stations without stopping, reducing noise and exhaust emissions, and decreasing pollution; Cost-saving: Saves expenses, reduces the frequency of vehicle starts and brakes, lowers wear and fuel consumption, and users can also enjoy a 5% discount on tolls; Improved efficiency: The theoretical efficiency of ETC lanes can be increased by 2-3 times, making traditional ETC more updated, faster, and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous. More policy support: The State Council clearly stated in the "13th Five-Year Plan for the Development of a Modern Comprehensive Transportation System" that "by 2020, the interoperability of transportation smart cards in key city clusters will be basically achieved, and the proportion of vehicles equipped with ETC will be significantly increased." It also explicitly set the goal in the main indicators of the "13th Five-Year" comprehensive transportation development that "by 2020, the ETC usage rate for road passenger vehicles will reach 50%." More future possibilities: In addition to continuously improving the convenience of ETC installation and usage and the usage rate of ETC passenger vehicles, the future will also promote the use of ETC for trucks, explore the deep integration of the ETC system with vehicle-to-vehicle communication, vehicle-road coordination, and other smart transportation development directions, providing comprehensive travel services for car owners. This means more application scenarios will support ETC applications. ETC usage precautions: The ETC transaction sensing area is 8 meters. When encountering a vehicle in front stopping, to prevent the ETC device of the front vehicle from malfunctioning or not having an ETC device at all, maintain a distance of more than 10 meters from the front vehicle to avoid automatic sensing and paying for the front vehicle. The recognition speed for ETC lane passage is 20 km/h. If the speed is too fast, the vehicle device information cannot be read, leading to failed deductions. Unauthorized disassembly or movement of the OBU device, or detachment or loosening of the ETC electronic tag, will cause the electronic tag to fail. It can be sent to the bank where the ETC card was issued or the highway service hall for testing. If the loosening or detachment is not man-made, it only needs to be reactivated. When using a debit card bound to ETC, insufficient balance will also cause deduction failure. Follow the guidance of on-site staff to use the manual MTC lane and pass by cash or card. Excessive thickness of the car windshield can cause poor sensing. This is especially important for vehicles that have had accidents and had their windshields replaced or for friends who have modified their front windshields.
11
4
Share

Is GF-6A oil low ash?

GF-6A oil is low ash. Definition of low ash oil: It is a specially designed oil for vehicles equipped with exhaust gas purification devices. Causes of low ash oil: It refers to the incombustible metal salts and metal oxides (such as metal sulfates, etc.) remaining after the oil is completely burned under specified conditions, usually caused by additives in the oil. As the ash content increases, the engine displacement gradually decreases, but the power does not decrease, which means the "power per liter" continues to increase, thereby increasing the pressure on the engine.
16
2
Share

What device is the power source of a tank?

The power plant is the power source of a tank. Tank power: It consists of the engine and its auxiliary systems. The auxiliary systems of the engine include the fuel supply system, air supply system, lubrication system, cooling system, heating system, and starting system. Function of the power source: The power plant of a tank is its power source. It is primarily used to generate the traction force that propels the tank and enables it to reach the required speed. This power plant also drives the generator to produce electricity, supplying power to the onboard electrical devices and charging the batteries, as well as operating the hydraulic and pneumatic devices. The power plant is often likened to the "heart" of a tank.
5
4
Share

Does replacing the brake master cylinder and ABS pump require bleeding?

Replacing the brake master cylinder and ABS pump requires bleeding. Working principle of ABS: During braking, the ABS quickly determines the wheel lock-up state based on the speed signals from each wheel speed sensor, closing the normally open input solenoid valve of the wheel that is starting to lock up to maintain the braking force. If the wheel continues to lock up, the normally closed output solenoid valve is opened, causing the braking pressure on that wheel to rapidly decrease due to the direct connection to the brake fluid reservoir, preventing the wheel from completely locking up due to excessive braking force. This keeps the braking state at the optimal point (slip ratio S of 20%), achieving the best braking effect and maximum driving safety. Classification of ABS: ABS is mainly classified based on channels. In ABS, the brake pipelines that can independently adjust the braking pressure are called control channels. ABS control channels are divided into four-channel, three-channel, two-channel, and one-channel types. One-channel ABS: Also known as single-channel ABS, it has a brake pressure regulator installed in the rear wheel brake master cylinder and a wheel speed sensor mounted on the rear axle differential (sometimes one on each rear wheel). Two-channel ABS: This type of ABS struggles to balance directional stability, steering control, and braking efficiency, and is rarely used today. Three-channel ABS: It independently controls the two front wheels, while the two rear wheels are controlled together based on the low-select principle (i.e., both wheels are controlled by one channel, ensuring the wheel with less traction does not lock up), also known as hybrid control. Four-channel ABS: It has four wheel speed sensors, with a brake pressure regulator installed in the pipeline leading to each wheel brake cylinder, enabling independent control and forming a four-channel control system.
15
5
Share
Trending Ranking
What is the C-IASI crash test result of the BYD Qin Pro?
Which Volkswagen Touareg model comes with a spare tire on the back?
Why can't the Volkswagen Lavida shift gears?
4
Can vehicle ownership transfer be done on Saturday?
5
Can Temporary License Plates Be Issued on Saturdays and Sundays?
6
Can the car key still be used after being washed with clothes?
7
What are the features of the Haval Big Dog's center console?
8
Where to Add Windshield Washer Fluid in Sinotruk Howo?
9
What are the symptoms of a faulty sensor in the Magotan?
10
What is the name of a Volkswagen car with the word 'Teng'?
More Forum Discussions

Where is the air purifier switch for the Haval Big Dog?

17
5
0

Which SUV models have high ground clearance?

12
5
0

What is the reason for the engine fault light in Audi Q5?

20
0
0

What are the criteria for classifying heavy-duty vehicles?

13
5
0
About Us
Terms of Use
Privacy Policy
Help
Contact Us
FAQ
Cookie
Cookie Policy
Cookie Settings
© 2025 Servanan International Pte. Ltd.