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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 can be found at many hardware stores and even big-box retailers. The battery can be replaced at the convenience of your home. Tulley BMW of Nashua will guide you through the process, so you can return to the Johns Creek roads in no time. How to Change a Battery Many BMW drivers aren't aware that they could have to replace the battery in their key fobs at some point in their ownership. This is one of the most simple DIY tasks for car maintenance that you can perform yourself. It will take no more than an hour to replace the battery, and the cost of replacement is minimal. The battery is available in a variety of local convenience stores as well as parts centers for less than ten bucks. The BMW key fob is normally powered by a CR2032, also known as a “watch” battery. Take off the key fob's cover and gently place the new battery. Make sure to pay attention to the orientation of the new battery since it has to be installed with the plus and minus signs facing the same direction like the old one. Once the new battery is installed, just put the cover of the key fob back on and you'll be able to drive your BMW around Decatur and Johns Creek again. Certain older BMW models have a different type of key that is an actual metal key that fits into the ignition. The batteries that are in these keys will also degrade in time, so you'll need to replace them in order to get your vehicle running. This type of battery can be recharged and replacing it requires cutting a small part of the key fob so be careful when you are performing this task. The procedure to replace the battery on this type of BMW key is a little different, but very easy. First, you'll need remove the metal key from the fob, then open the access port on the back of the key fob. After you have opened the access port and then, use a screwdriver that is flat to split the two halves of the fob. After the two halves have been separated, you are able to remove the dead battery and then insert the new one. The two halves will snap back together once you've replaced the battery. If you need assistance or have any other questions regarding how to replace the battery on your BMW key fob, please contact us now! Our team is always ready to help. We look forward to helping you with all your automotive needs! Battery CR2450 It's possible you didn't know that the BMW key fob requires a special battery to perform as it should. The CR2450 is a 3-volt lithium-ion coin cell battery. It powers the key fob's various functions, including remote locking, unlocking, ComfortAccess functionality and even remote start of your vehicle! These features require the extra power that comes from a CR2450 battery that is slightly larger in size than its CR2032 counterpart. These batteries are available at gas stations and supermarkets, as well as other retailers that sell lithium batteries with 3 volts. They usually cost between $7 to $9 for a set of four batteries, but careful price comparison shopping could reveal cheaper options from lesser-known brands. Change the battery inside your BMW key fob is a straightforward process that doesn't require any additional reprogramming or resyncing with your vehicle. Simply remove the valet key from the fob, press the small tab that's in the opening, then pull out the existing battery. Install the new battery exactly the same way and ensure that the positive side faces towards the upward direction. Reassemble the fob. After you've replaced your battery in your BMW key fob, you must test it to ensure it locks and unlocks the car properly and works with all of its other expected functions. For instance, you can press the buttons on the fob to verify that they lock, turn off or pop the trunk. After you're confident that everything works as expected then put the fob in place and go! The key fob also contains an embedded chip that contains the security codes and programs necessary to communicate with your BMW. The information is powered by the key fob's battery, but the chip is designed to keep this information even when the battery is removed. This is one of the reasons why it's important to change the battery quickly when it starts to wear out. The majority of BMW models utilize the sleek CR2032 battery to power their key fobs. The battery is commonly used in electronic devices and can be easily replaced when needed. A larger CR2450 is required for models that use the remote start or Comfort Access features. This is a larger battery, specially designed for use in high-drain situations. It can be purchased at various retailers. They have a nominal capacity of 600-620 mAh and can last up to 10 years when properly stored. They are a great choice for any high-drain task that requires the longevity and performance. For the best results, go with a reputable brand for your replacement battery. This will ensure that the new battery is of the highest quality and will stand up to rigorous everyday use. CR2032 Battery The CR2032 battery is a common coin cell found in a wide range of electronic devices, such as remote controls and key fobs. It can also be used in fitness and medical trackers. This kind of battery is also used in heart rate monitors from companies such as Polar, Garmin and Wahoo Fitness. It is also widely used in bike components like road shifters from SRAM and FSA as well as in a few headlights. A CR2032 is a lithium chemistry device, and is a round shape with a diameter and height of 20 and 32 millimeters. It has a very low self-discharge rate, which means it can remain dormant for years without losing too much of its charge. This low self-discharge rate and the ability to keep a charge even in extreme temperatures make this an extremely popular battery for electronic devices. Battery storage life can depend on a myriad of factors such as the quality of the material, storage conditions and storage time, physical damage, humidity and temperature. It is recommended to store the battery in a controlled climate and dry location that is free of physical damage or degradation. It is essential to buy high-quality batteries from reputable retailers. Lower quality batteries can have lower mAh capacity and will eventually die. 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 sought-after brands include Energizer, Panasonic and Duracell. These brands are renowned for their dedication to the highest standards of security and reliability. If you have questions regarding the authenticity of a particular battery or its packaging, it's best to contact the manufacturer directly for additional details. One of the most important things to remember when using a CR2032 battery is that it has a positive and negative terminal. The positive terminal of a CR2032 battery is marked with a dot at the top, and the negative terminal is marked by a line on the base. If you place the battery into a device wrong way up the device could get damaged or even a fire hazard. Unlike some types of batteries, there is no plug or socket to connect to it. Instead, a CR2032 battery is connected to the device via a metal tab. The tab needs to be pressed to connect the battery. This is only done by hand. If you're putting the CR2032 battery into a device like smoke detectors or sensors ensure that the tab contacts on the metal are in the proper location. If not the device will not work or you could encounter inconsistent results. lost bmw key for most smoke sensors and detectors include diagrams that show which way to insert the batteries. If you can't find a diagram for your device it's a good idea that you watch a video on how to insert the batteries.