What is the battery model for the Corolla key?
3 Answers
The battery model for the Corolla key is CR2032. CR2032 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; 32 represents that the battery height is 3.2mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity varies between 200-240mAh, depending on the manufacturer's standards. The shelf life of CR2032 is typically 5 years. If the manufacturing level of the producer is low 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.), the lifespan can be further extended to 8 years or even 10 years. Generally, replacing a car key battery only requires the following three steps: Step 1: Remove the mechanical key. Press the buckle on the side of the smart key to remove the mechanical key. Step 2: Open the battery cover. After removing the mechanical key, you can see a deep slot and a shallow slot at the top of the smart key. The deep slot is the keyhole, while the shallow slot is used to open the battery cover. Insert the mechanical key into the shallow slot and pry it outward with force to open the battery cover. Once opened, you will see the button battery. Gently pry it out to remove the battery. Step 3: Replace the new battery. Install the new battery, then reassemble the battery cover and mechanical key in order. The key battery replacement is now complete.
Every time I replace the battery for my Corolla's remote key, I use the CR2032 model. The model number is printed on the old battery or inside the key cover. Be careful not to damage the plastic clips when prying open the back cover—it's best to use a thin tool and open it slowly. After removing the old battery, place the new CR2032 with the positive side facing up to avoid short circuits. You can buy the battery at a supermarket or online, and opting for big brands like Panasonic or Sanyo ensures better durability, costing just a couple of yuan each. After replacement, test the lock and unlock functions to ensure they're responsive. I usually check once a year—if the remote range shortens or the buttons stop responding, it's likely the battery is nearly drained. Keeping a spare battery in the car saves money and hassle. Last time I replaced it, the key responded much faster—it's an easy DIY task.
The battery model for the Corolla key is mostly CR2032, which is generally compatible from older models to new ones. However, some newer versions may use CR1620, so it's recommended to open the key cover and check the label on the old battery for confirmation. The CR2032 is a 3V coin cell battery, perfectly sized for the key slot. If unsure about the model, refer to the owner's manual or search online for the Corolla's year plus key specifications. When replacing the battery, handle it gently to avoid damaging the key chip or exposing it to moisture. You can buy batteries at convenience stores or auto parts shops—I recommend the Panasonic series for being affordable and durable. If you can't find the right model, take the old battery to the store and ask the staff to help match it. After replacement, test the key functions to ensure they work properly. Typically, the battery lasts about a year and a half, so keep an eye on its lifespan to avoid remote failure when you're out and about.
