What is the battery model for the Mercedes-Benz GLA key?

[VanRyan]

The battery model is CR2025. 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 used as a substitute if it is square; 20 indicates that the battery diameter is 20mm; 25 represents a battery height of 2.5mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity ranges from 140-170mAh. CR2025 typically has a lifespan of 5 years. If the manufacturer's production level is not high or quality control is poor, its lifespan will 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, etc.), 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 vehicle can still be opened and started using the mechanical key. The batteries used in car remote keys are button batteries, mainly three types: CR2016, CR2025, and CR2032. For the specific model used in each key, owners can refer to the battery model 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 operate at 9V, so three batteries need to be replaced each time. Examples include brands like Guangben, Toyota, Volkswagen, and Mazda. CR2016 specifications: battery diameter of 20mm and thickness of 1.6mm. Button-type CR2025 battery: Its usage rate is much lower than that of CR2016, but it is still used in some car keys. It is thicker than CR2016 but has a relatively higher storage capacity. CR2025 specifications: battery diameter of 20mm and thickness of 2.5mm. This type of battery is also commonly used in audio remotes. Button-type CR2032 battery: The voltage is also 3V, but the capacity is around 200mAh, making it twice as thick as CR2016. The 3V-CR2032 lithium manganese battery has a 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 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. 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, such 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 for light emission, sound production, and RF output in most small electronic products.

[Omar]

The remote key battery model for the Mercedes-Benz GLA is generally a CR2032 button cell, which is widely available on the market with a voltage of 3 volts, suitable for various electronic devices. Having worked in a garage, I often encounter customers asking about this. The Mercedes key design is simple, highly compatible, and easy to replace. Remember to use batteries from reputable brands to avoid damaging the key circuit with counterfeit products. The battery life typically lasts around 1 to 2 years, depending on usage frequency and environmental temperature. It's advisable for car owners to keep a spare at home to prevent sudden key failure, which could affect travel safety. Replacing it yourself is cost-effective, saving the hassle and time of visiting a 4S store.

[VanessaMarie]

A while ago, my Mercedes-Benz GLA key malfunctioned—the buttons weren't responding, and the car displayed a low battery warning. After checking online, I found the battery model was CR2032, so I bought a new one from the supermarket. The replacement process was simple: first, use a thin tool to pry open the key cover, remove the old battery while noting the correct polarity to avoid installing it backward. Then, insert the new battery, close the cover, and test the unlock function—everything worked normally again. The whole process took less than five minutes, saving me dozens of dollars in labor costs. Reminder: regularly check the battery level to avoid getting locked out. I’ve made it a habit to press the buttons a few times before leaving to confirm the key's status.

[Olga]

The battery for the Mercedes-Benz GLA key is the CR2032 model. Using an incorrect battery may lead to voltage mismatch and increase the risk of damaging the key chip. From my experience handling similar issues, many car owners casually use other batteries, resulting in key failure, which is not worth the risk. For safety, always purchase CR2032 batteries from authorized stores to avoid potential hazards. Replace the battery promptly when it runs out to ensure smooth daily use of the vehicle. Carrying a spare battery provides extra peace of mind.