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Changing the Battery in Your BMW Car Key Fob

Many BMWs require that the key fob has a slant-shaped, sleek battery. This kind of battery is available in a variety of hardware stores and even at big-box retailers.

This battery can be changed at the convenience of your home. Tulley BMW of Nashua will guide you through the procedure, so that you can return to the Johns Creek roads in no time.

How to Replace a Battery

Many BMW owners are unaware that they might need to replace the battery in their keyfob at some point. Fortunately, this is one of the easiest car maintenance tasks you can tackle yourself. The battery replacement should only take a few moments and is a bargain. The battery can be found in a variety of local convenience stores as well as parts centers for less than ten dollars.

In the majority of instances the BMW key fob uses the CR2032 battery and is often called a "watch battery." Remove the cover of the key fob, and then carefully insert the new battery gently. Make sure you pay close attention to the orientation of the new battery, since it has to be installed with the plus and minus symbols in the same direction as the previous one. After the new battery is installed, just put the key fob cover back in place, and you'll be ready to drive your BMW around Decatur and Johns Creek again.

Certain older BMW models have a distinct key type that is a steel key that you insert into the ignition. These keys can also die in time, and you will need to replace the battery in order for your vehicle to start. This kind of battery is rechargeable, and replacing it involves cutting a small portion of the key fob so be very careful when you are performing this task.

The process for changing the battery in this type of BMW key is a little different, but it's still very easy. First, you'll need remove the metal key from the fob, then, you'll need to open the access port in the back of the key fob. Once you've opened the access port, you'll need to make use of a flat screwdriver to split the two halves of the key fob. Once the key fob is split in two parts, you can easily remove and replace the dead battery. The two halves will snap back together after you've replaced the battery. If you require assistance or have additional questions about how to change the battery on your BMW key fob, please contact us now! Our team is always there to assist you. We are looking forward to helping you with all your automotive requirements!

Battery CR2450

It's possible you didn't know that the BMW key fob requires a specific battery in order to function properly. The CR2450 battery is a three-volt lithium coin cell battery that powers the many different functions of your key fob, such as remote locking and unlocking, Comfort Access functionality, and even remotely starting your car! bmw replacement key require the CR2450 coin cell battery which is slightly larger than its CR2032 equivalent.

These batteries are available at gas stations and supermarkets, as well as other stores which sell lithium batteries of 3 volts. They typically cost $7 to $9 per four-pack, but a careful comparison of prices could reveal lower-cost alternatives from lesser-known brands.

The battery change in your BMW key fob is a simple procedure that doesn't require additional programming or resyncing with your vehicle. Remove the valet key, remove the battery and push the tab. Place a brand new battery in the same way, ensuring that the positive side is facing upwards and then reassemble the fob.

After you've replaced the battery in your BMW key fob, it's important to test it to make sure it locks and unlocks the car correctly and is compatible with all its other expected functions. You can, for instance, press each button on the fob to make sure they lock, turn on or pop the trunk. Once you're certain that everything works as you expected then put the fob in place and go!

The key fob also contains an embedded chip that contains the security codes and programming necessary to communicate with your BMW. The battery that powers the key fob is responsible for this information, however the chip is able to keep it even after you have removed the battery. This is why it's important to replace the battery at the time it begins to wear out.

The majority of BMW models utilize the sleek CR2032 battery for their key fobs. This is a typical battery type that's found in a variety of electronic devices and is simple to replace whenever you need to. For models that use the remote start and Comfort Access features however, a bigger battery CR2450 is required. This is a much more powerful battery that is specifically made for these applications and can be bought from a wide range of retailers. They can last up to 10 Years when maintained properly. They come with a nominal power of 600-620mAh. They are a great choice for any high-drain application where you want to maximize longevity and performance. Make sure you choose a reliable replacement battery for the most efficient results. This will ensure that the new battery is of high-quality and will stand up to the demands of daily use.

CR2032 Battery

A CR2032 Battery is a popular type of coin cell battery that is used in many electronic devices including key fobs, remote controls and fitness and medical trackers. This kind of battery is also commonly used in heart rate monitors made by companies like Polar, Garmin and Wahoo Fitness. It is also utilized in bike components such as road shifters from SRAM and FSA as well as in some headlights.

As the name implies, the CR2032 battery is a lithium-based one and is round in form with a diameter of 20 millimeters and a height of 32 millimeters. It has a low self-discharge rate, which means it can be left in dormancy for years without losing too much of its charge. This battery is a favorite for electronics because of its low self-discharge as well as the ability to hold a charge even in extreme temperatures.

The life of batteries can depend on a variety of factors such as the quality of the material storage conditions and storage time as well as physical damage, humidity, and temperature. Ideally, you want to store the battery in a climate controlled and dry location that is free of physical damage or degradation. It is crucial to only purchase the best quality batteries from reputable retailers. Low-quality batteries may have lower mAh capacity and die prematurely.


Coin-cells made of lithium are available from the majority of major battery manufacturers and can be found in a wide range of retail stores. Some of the most popular brands are Energizer Panasonic and Duracell. These brands are renowned for their commitment to the highest standards of safety and reliability. If you are unsure about the authenticity of the battery or the packaging, it is best to ask the manufacturer for more details.

One of the most important points to remember when using a CR2032 battery is that it has two terminals: positive and negative. The positive terminal of a CR2032 battery marked with a dot at the top. The negative terminal is marked with a line at the base. If the battery is placed into an item with the wrong side facing upwards it could cause damage to the device or create a fire hazard.

There isn't a socket or plug to connect the CR2032 battery. A CR2032 connects to a device via a metal tab. The tab needs to be pressed down to connect the battery and can only be done by hand. Installing a CR2032 into a device, such as a smoke detector or sensor requires the tab contacts on the metal be in the correct position. If not the device will not work or you might have inconsistent results. Luckily, the instructions for the majority of smoke detectors and sensors include diagrams that show the best method to insert the battery. If you are unable to find the wiring diagram for your specific device it's an excellent idea to look up an instructional video that demonstrates how to install the battery.

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