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Changing the Battery in Your BMW Car Key Fob Many BMWs require a key fob with an elegant, slant-shaped, sleek battery. This type of battery is available at a wide range of hardware stores, and even big-box stores. The battery can be replaced in the convenience of your home. Tulley BMW Nashua can guide you through the process to ensure you can get back on Johns Creek roads quickly. How to Change a Battery Many BMW owners don't know that they may need to change the battery in their key fob at some point in their ownership. This is one of the easiest DIY car maintenance tasks that you can do yourself. The replacement of the battery should take just a few minutes, and it is inexpensive. The battery is available at local convenience stores and auto parts centers for less than ten dollars. The BMW key fob is normally powered by a CR2032 or a “watch” battery. Take off the cover of the key fob and then gently insert the new battery. Pay attention to the orientation. The new battery needs to be placed in a way that the plus and symbols for minus are facing the same way as the previous battery. Once the new battery has been put in place, simply place the cover for the key fob back in place and you'll be able to drive your BMW around Decatur and Johns Creek again. Some older BMW models have keys of a different kind that is the physical key made of metal that is inserted into the ignition. Keys can also become obsolete in time, and you will need to change the battery to allow your vehicle to start. This type of rechargeable battery requires you to cut off a tiny piece of the key fob in order to replace it. The procedure to change the battery in this kind of BMW key is a little different, but extremely simple. First, you'll have to remove the key made of metal from the fob, and then open the access port on the back of the key fob. Once you've opened the access port then use a screwdriver with a flat head to separate both halves of the fob. Once the key fob has been split in two parts, you can easily remove and replace the dead battery. Once you've replaced the battery, you can simply snap the two halves of the key fob together again. Contact us today if you require assistance or have concerns about replacing the battery in your BMW Key Fob. Our team is always ready to assist. We are looking forward to helping you with all your automotive requirements! CR2450 Battery It's not obvious, but your BMW key fob uses a special battery to work correctly. The CR2450 is a lithium-ion 3 volt coin cell battery. It powers the key fob's various functions, such as remote locking and unlocking, ComfortAccess, and even remote starting your vehicle! These functions require additional power that comes from a CR2450 battery that is a bit larger than its CR2032 counterpart. You can find these batteries in most places that sell regular lithium batteries of 3 volts like supermarkets and gas stations. They typically cost $7 to $9 per four-pack, however a careful comparison of prices could reveal cheaper alternatives to lesser-known brands. The battery change inside your BMW key fob is an easy procedure that doesn't require additional programming or resyncing with your vehicle. Simply remove the valet key from the fob, press a small tab in the opening, and then pull out the current battery. Place a new battery in the same way, making sure that the positive side is facing up, and reassemble the fob. After you've replaced your battery in your BMW key fob, it's crucial to test it to make sure it locks and unlocks the car correctly and is compatible with all its other functions that are expected. You can, for example, press each button on the fob to make sure they lock, turn on or off the trunk. After you're confident that everything works as expected then put the fob in place and go! The key fob contains an electronic chip that stores security codes and programs needed to connect with your BMW. This information is powered by the battery in the key fob however, the chip is designed to keep this information even when the battery is removed. This is why it's so important to replace the battery when it begins to wear out. The majority of BMW models utilize the sleek CR2032 battery in their key fobs. It's a standard battery type that's found in all electronics and is easy to replace whenever you require it. A larger CR2450 battery is required for models with remote start or Comfort Access features. This is a stronger battery, specially designed for high-drain applications. It is available at a variety retailers. They can last up to 10 years when kept in a safe and secure manner. They come with a nominal capacity of 600-620mAh. They are a good option for any application that requires longevity and performance. Choose a reputable replacement battery for the best results. This will ensure that your new battery is of the highest quality and will stand up to the rigors of daily use. Battery CR2032 The CR2032 battery is a popular coin cell that is used in a wide range of electronic devices, such as key fobs and remote controls. It can also be used in fitness and medical trackers. This kind of battery is also found in heart rate monitors manufactured by companies like Polar, Garmin, and Wahoo Fitness. It is also widely found in bike components such as road shifters by SRAM and FSA as well as certain headlights. The name suggests that the CR2032 battery is made up of lithium chemistry and is round in form with a diameter of 20 millimeters and a height of 32 millimeters. It has a very low self-discharge, so it can remain dormant for years without losing too much of its charge. The low self-discharge rate as well as the ability to hold a charge in extreme temperatures make this a very popular battery to use in electronics. Battery life depends on a variety of variables including material quality storage conditions and storage time and physical damage, humidity, and temperature. The ideal storage space is a dry, climate-controlled area with no physical damage. It is important to only purchase the best quality batteries from reliable retailers. bmw key fobs that are not of the highest quality may have lower mAh and may die prematurely. Coin cells made of lithium are available from most major battery manufacturers and can be found at most large retail stores. Some of the most popular include Energizer, Panasonic and Duracell. These brands are known to adhere to the most stringent safety and reliability standards. If you are unsure about the authenticity of the battery or its packaging, it is best to ask the manufacturer for more information. One of the most important aspects to keep in mind when using a CR2032 battery is that it has both a positive and negative terminal. The positive terminal of a CR2032 battery marked with a dot on the top. The negative terminal is marked by a line at the base. If you insert the battery into a device the wrong way up, the device could be damaged or even become a fire risk. There isn't a socket or plug to connect the CR2032 battery. Instead a CR2032 battery connects to the device via an aluminum tab. The tab needs to be press to connect the battery. This is only done by hand. Installing a CR2032 into a device like a smoke detector or sensor requires the tab contacts on the metal be in the proper position. If they aren't it could not work or you could experience inconsistent results. The instructions for all smoke detectors and smoke sensors include diagrams that show which way to insert the batteries. If you are unable to find the diagram for your specific device, it's a good idea that you watch a video on how to install the batteries.