How to Replace the Battery in a B30 Car Key?

[KingstonFitz]

To replace the battery in a Besturn B30 car key, follow these steps: 1. Locate the round button on the side of the car key. Press and hold this button with one hand while pulling out the mechanical key with the other hand. 2. Find the gap in the middle of the key's top end and insert a flat-head screwdriver into it. 3. Gently pry the key up and down until a gap is created. 4. Remove the key's circuit board, then gently push one side of the battery with your finger to remove it. 5. Install the new battery with the positive side facing up. Additional information: Taking the 2019 Besturn B30 as an example, its body structure is a four-door, five-seater sedan with dimensions of 4625mm in length, 1790mm in width, and 1500mm in height. It has a wheelbase of 2630mm, a fuel tank capacity of 50 liters, a trunk capacity of 480 liters, and a curb weight of 1270kg.

[JoannaRose]

I just replaced the battery in my B30 key last week, and the whole process took less than ten minutes. First, prepare a CR2032 button battery, which you can find at stationery stores or supermarkets. To open the key, pull out the metal key head, then use a coin or nail file to gently pry open the plastic shell along the seam. Once opened, you'll see the old battery slot—use a toothpick to lift it out and replace it with the new one, making sure the silver side faces up. After installation, press the remote button twice to check if the light turns on. If everything works, simply snap the shell back together. Doing it yourself can save you 50 to 60 yuan in labor costs. The only thing to watch out for is not to use too much force when prying open the shell clips—my colleague broke one last time.

[DiLucille]

I've changed the key fob batteries for three cars now, and the B30 is quite easy to handle. If you're unsure, you can spend ten bucks at an auto parts store to have someone do it for you, but doing it yourself is simpler. First, make sure the battery model is CR2032. Some off-brand batteries die after just three months, so I recommend choosing Panasonic or Sony. When opening the key fob, pay attention to the seam on the back—there's usually a small notch. Use a thin card to slide along the seam to open it. Avoid touching the metal contacts on the circuit board when replacing the battery. If the remote range shortens after installation, it might be due to poor battery contact or low voltage. Lastly, don’t just toss the old battery in the trash—most communities have designated battery recycling points.

[LaJoshua]

After replacing my car key battery four times in eight years, I've gained some experience. When the key battery is low, the vehicle dashboard will display a warning alert, and you should replace it immediately. When opening the key casing, choose a well-lit area and be careful not to lose the internal waterproof rubber seal. Some owners mistakenly replace it with CR2025 batteries - while they fit, their smaller capacity means they won't last long. If you encounter difficulty opening the casing, it might be due to deformed clips from previous drops; in such cases, I recommend visiting a key shop that has professional tools. After replacement, the remote control distance should restore to about 30 meters - if it only works within 5 meters, you should check the circuit. Regular replacement can prevent embarrassing situations like suddenly being unable to lock your car.