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Changing the Battery in Your BMW Car Key Fob Many BMWs require a key fob that has an elegant, slant-shaped, sleek battery. This type of battery is typically found at hardware stores, or even big-box stores. The battery can be changed in the comfort of your own home. Tulley BMW of Nashua will guide you through the procedure, allowing you to return to the Johns Creek roads in no time. How to Replace a Battery Many BMW drivers don't realize that they may need to change the battery in their key fobs at some point during ownership. This is among the easiest DIY car maintenance tasks that you can do yourself. The replacement of the battery should take only a few minutes, and it is inexpensive. The battery can be found at local convenience stores and auto parts shops for less that ten dollars. The BMW key fob is usually powered by a CR2032 which is also referred to as a “watch” battery. Remove the key fob's cover and then gently place the new battery. Be aware of the orientation. The new battery must be installed so that the plus and minus symbols are facing the same direction as the previous battery. Once the new battery is installed, just put the cover of the key fob back in place, and you'll be ready to drive your BMW around Decatur and Johns Creek again. Certain older BMW models have an alternative type of key, which features a physical metal key that is inserted into the ignition. The batteries in these keys also degrade in time, so you will need to replace them to get your vehicle running. This type of rechargeable battery requires you to cut off a tiny piece of the key fob to replace it. The procedure for changing the battery in this kind of BMW key is a little different, however it's simple. You'll first have to remove the key fob made of metal and then open the port on the side of the key. Once you've opened the access port, use a flat-headed screwdriver to split the two halves of the fob. Once the key fob has been split in two parts it is easy to remove and replace the battery that is dead. Once you've replaced the battery, you can simply snap the two halves of the key fob again. Contact us today if require assistance or have concerns about replacing the battery in your BMW Key Fob. Our team is always there to assist. We are eager to assist you with all your automotive requirements! CR2450 Battery It's not obvious, but your BMW key fob requires an exclusive battery to function correctly. The CR2450 is a lithium-ion 3 volt coin cell battery. It powers the key fob's numerous functions, such as remote locking unlocking, ComfortAccess and even remote start of your vehicle! These functions require the additional power that comes from a CR2450 battery that is slightly larger than its CR2032 counterpart. These batteries are available in all places that sell regular 3-volt lithium batteries like supermarkets and gas stations. G28 cost $7 to $9 per four-pack, but a careful comparison of prices could reveal lower-cost alternatives from lesser-known brands. Change the battery inside your BMW key fob is an easy process that doesn't require any additional reprogramming or resyncing with your vehicle. Simply remove the valet key from the fob, push the small tab that's in the opening, and pull out the current battery. Place the new battery in exactly the same way and ensure that the positive side is facing towards the upward direction. Reassemble the fob. After you've replaced the battery in your BMW key fob, you must test it to make sure it locks and unlocks the car correctly and works with all of its other functions expected of it. For example, you can test pressing the buttons on the fob to see if they turn on, lock, or pop the trunk. Once everything is functioning as expected then you can put the fob back together and be moving! The key fob also houses an embedded chip that contains the security codes and programs necessary to communicate with your BMW. The key fob battery powers this information, but the chip is able to keep it even after you have removed the battery. This is why it's so important to replace the battery as soon as it starts to wear out. BMW key fobs are powered by the sleek CR2032 batteries. The battery is commonly used in electronic devices and can be easily replaced when needed. For models that make use of the remote start and Comfort Access features however, a bigger battery CR2450 is required. This is a more powerful battery that has been specifically made for high-drain use. It can be purchased at various retailers. These batteries can last up to 10 Years when stored properly. They have an average power of 600-620mAh. These batteries are ideal for high-drain applications where you need to maximize the performance and endurance. Choose a reputable replacement battery for the most efficient results. This will ensure that the new battery is of the highest quality and will stand up to the demands of daily use. CR2032 Battery A CR2032 Battery is a popular kind of coin cell battery used in a variety of electronic devices like key fobs, remote controls and fitness and medical trackers. This type of battery is also commonly used in heart rate monitors manufactured by companies like Polar, Garmin and Wahoo Fitness. It is also commonly used in bike parts such as road shifters made by SRAM and FSA as well as in a few headlights. The name suggests that a CR2032 battery uses lithium chemistry and is round in form with 20 millimeters of diameter and a height of 32 millimeters. It has a very low self-discharge, so it can lie dormant for a long time without losing too much of its charge. This low self-discharge rate and the ability to hold a charge in extreme temperatures make it a very popular battery for electronics. Battery life is contingent on a variety of elements, including the material, storage conditions, storage time and storing, humidity, physical damage, and temperature. The ideal storage space is an air-conditioned, dry area without physical damage. It is crucial to purchase only the best quality batteries from trusted retailers since low-quality batteries could have lower capacities in mAh and could end up dying prematurely. Major battery makers offer lithium coin cells. They are also sold in many large retail stores. Some of the most popular include Energizer, Panasonic and Duracell. These brands are reputed to adhere to the highest 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 details. When using a CR2032 it is crucial to be aware that the battery has a positive and the negative terminal. The positive terminal is identified by a dot at the top of the battery and the negative terminal is marked with an outline across the base. If the battery is inserted into a device with the wrong side facing forward it could cause damage to the device, or even create a fire hazard. As opposed to other kinds of batteries, there is no plug or socket to connect it. A CR2032 connects to a device via an aluminum tab. The tab has to be press to connect the battery. This can only be done by hand. If you're installing the CR2032 battery into a device, such as a smoke detector or sensor make sure the metal tab contacts are in the correct location. If not the device will not work or you might encounter inconsistent results. Fortunately, the manuals for most smoke detectors as well as sensors include diagrams that show the best way to insert the battery. If you can't find the wiring diagram for the specific device, it's a good idea to watch an instructional video on how to insert the battery.