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

[VanNicole]

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 shape is cylindrical, with F used as a substitute if it is square; 20 indicates the battery diameter is 20mm; 25 represents the battery height is 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 low or quality control is poor, the lifespan can be significantly shortened. Domestic first-tier brand batteries can generally guarantee this lifespan. Under ideal usage conditions (sealed, room temperature, no moisture interference, etc.), the lifespan can be further extended to 8 years 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 battery life will be. If the remote key battery runs out of power, the vehicle can still be opened and started using the mechanical key. Car remote keys use button batteries, mainly three types: CR2016, CR2025, and CR2032. For the specific model used in each vehicle, 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 car remote batteries. The battery voltage is 3V, while most car key batteries are powered by 9V, so all three batteries need to be replaced each time. Examples include brands like 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 it is still used in some car keys. It is thicker than the 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 battery CR2032: The voltage is also 3V, but the capacity is around 200mAh, making it twice as thick as the 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 dimethoxyethane, propylene carbonate, and lithium perchlorate. It is shaped like a button, hence the name button lithium battery or lithium-manganese button battery. Button battery CR2450: 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 of most small electronic products for light emission, sound production, and RF output.

[McAlex]

I frequently deal with Mercedes-Benz key issues. The key battery for a Mercedes GLA is typically a CR2025 coin cell. This little thing has a 3V voltage and can be bought at supermarkets or auto parts stores for a couple of yuan per pack. Replacing it yourself is simple: use a small screwdriver or plastic pry tool to gently open the key's back cover. When removing the old battery, be careful not to break the spring. Then insert the new CR2025 with the positive side facing up, aligning it with the contacts. After replacement, test the lock and unlock functions—if there's no response, the battery might be inserted backward. These batteries usually last one to two years. If the key starts responding slowly or fails at a distance, it's likely running low. Similar Mercedes models like the A-Class or C-Class also use this battery type. Tool kits are cheap online, saving you hundreds compared to dealership service.

[Lloyd]

As a GLA owner for several years, I've replaced the key battery twice with the CR2025 model. Last time I bought a new pack at Target for two dollars and fifty cents. To open the back cover, just use a small blade or the fork attached to a keychain. Remove the old battery and insert the new one with the positive side facing up. After replacement, I noticed the unlock response was faster—no more pressing multiple times before the light comes on. Tip: Don’t wait until the battery is completely dead to replace it, as it might get stuck. Also, avoid placing the key in damp areas or dropping it, as the battery may loosen. Most entry-level Mercedes models use CR2025, which is highly compatible. Watch video tutorials a few times, and even beginners can handle it. Battery life depends on usage frequency—I replace mine roughly every 18 months for convenience and cost savings.

[DelMolly]

As a new owner of a Mercedes-Benz GLA, I was told by a friend that the key battery model is CR2025 and decided to try replacing it myself. The process is quite simple: search for an instructional video online, use a small tool like a coin edge to gently pry open the back cover, remove the old battery without applying excessive force, and insert the new one with the positive side facing the contact point. The battery is available at convenience stores for a few dollars—just confirm the model before purchasing to avoid mistakes. After replacement, test the key functions like locking and unlocking to ensure everything works properly. Don’t worry about complexity; it takes just five minutes, but prioritize safety by wearing gloves to prevent scratches. The battery typically lasts one to two years—if any abnormalities appear, seek professional inspection.

[SanGia]

The Mercedes-Benz GLA key uses a CR2025 battery. Considering environmental and cost factors, I opt for recyclable brands. Each replacement costs a few dollars, with a lifespan of about two years. To save, avoid frequent button presses to slow battery drain and choose high-quality brands to prevent leakage and contact damage from cheap ones. Always recycle old batteries at designated supermarket stations to reduce resource waste. The key's smart design includes a dashboard warning for low battery, allowing timely replacement to save power and money. Similar small Mercedes models use the same battery type, making maintenance simple without professional tools. Don't overlook this small detail for overall peace of mind.

[SanPenelope]

The standard battery for the Mercedes-Benz GLA key is CR2025, but as a maintenance enthusiast, I'll expand on the care details: Besides replacing the battery, clean the contacts with a cotton swab to prevent dust or water ingress, avoiding long-distance failure. The battery life is typically one to two years. While CR2032 is compatible, it's not recommended due to thickness differences. When replacing, gently pry open the cover and ensure the positive side faces upward. Avoid dropping the key or exposing it to high temperatures daily. The system will prompt for low battery, allowing quick resolution. Similar to other Mercedes-Benz family keys with the same structure, keeping tools at home saves hassle and prevents issues, enhancing the overall vehicle experience.