What is the battery model for the old Mazda 6 key?

[LukeRose]

The battery model for the old Mazda 6 key is CR1620. CR1620 is a lithium manganese dioxide battery, named according to the IEC standard. The breakdown 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, F would be used instead. 16 - Indicates the battery diameter is 16mm. 20 - Represents the battery height of 2.0mm. The nominal voltage is 3.0V, the endpoint voltage is 2.0V, and the rated capacity ranges from 140-170mAh. The shelf life of a CR1620 is typically 5 years. However, if the manufacturer's production standards or quality control are poor, the lifespan can be significantly reduced. Top domestic brands can generally guarantee this lifespan. Under ideal conditions (sealed, room temperature, no moisture, etc.), the lifespan can extend further to 8 or even 10 years. Generally, replacing a car key battery involves the following 3 steps: Step 1: Remove the mechanical key. Press the latch on the side of the smart key to release the mechanical key. Step 2: Open the battery cover. After removing the mechanical key, you will see a deep slot and a shallow slot at the top of the smart key. The deep slot is for the keyhole, while the shallow slot is used to open the battery cover. Insert the mechanical key into the shallow slot and pry it open to reveal the coin battery. Gently remove the battery. Step 3: Replace the battery. Install the new battery, then reattach the battery cover and mechanical key to complete the replacement.

[OGage]

I remember driving an old Mazda6 for several years, and the key fob battery running out was a common issue. Last time I went camping, the key suddenly stopped working, which gave me a scare, but it turned out to be just a dead battery. The battery model is CR2032, a very common coin cell that you can buy for a few bucks at a convenience store. Replacing it yourself is easy—just use a coin or a small knife to pry open the edge of the key fob, locate the round battery, and swap in a new one. Make sure the positive side faces up to avoid reversing it. After replacement, the remote range is restored, making it very convenient. I recommend proactively replacing it every 1-2 years to avoid emergencies. It’s also good to keep a spare in the car. Older models have good compatibility, so avoid using other battery types to prevent voltage instability or damaging the key fob’s circuit. This small task can save you big trouble, and developing a habit of regular checks can extend the key fob’s lifespan.

[LaJace]

As an avid car maintenance enthusiast, I've replaced the battery in my Mazda 6 key fob many times. It's usually a CR2032 battery issue, as its standard 3V voltage matches the remote system. Opening the key is simple: locate the notch at the end, gently pry it open, remove the old battery and insert a new one, then clean any rust on the contacts. If the battery is weak, the car might respond slowly or fail to start, requiring the physical key to unlock. I recommend Panasonic or Energizer brands for their durability and affordability. Store the key in a dry place, and replace the battery earlier in winter when power drains faster. DIY replacement saves time and money – just 5 minutes to get it done, don't wait until it fails at a critical moment. Remember, as long as you get the right battery model, you can confidently replace it – old car keys can still be reliable.

[Blake]

Don't panic if your old Mazda 6 key fob fails—the battery is usually a CR2032. I've been through this once when the button range shortened or stopped responding, and thankfully it was just this minor issue. A quick trip to the hardware store for a few bucks to replace it fixed it immediately. Replacement steps: Pry open the seam at the back of the key, remove the old battery, insert the new one (ensure the positive side isn't reversed). Preventatively changing it every two years is safe and cost-effective, avoiding being stranded. Using the wrong battery model risks circuit damage. Maintaining your key well can save repair costs—keep it dry to extend component lifespan.