How to Remove the Key Battery of Besturn X40?

[Verona]

From the tail of the key, push up the marked switch, and the hidden mechanical key will pop out slightly, then you can take out the mechanical key. Use the just removed mechanical key to press against the marked position, apply a little force, and the key shell can be opened. After the key shell is opened, insert an object along the gap on both sides, gently pry it, and the old battery can be removed. Do not expose the key to environments below 0 degrees Celsius (too cold) or above 50 degrees Celsius (too hot), as this will significantly reduce the battery's lifespan.

[JosephLee]

When my Bestune X40 key fob ran out of battery, I replaced it myself—the process was quite simple. There's usually a small gap or groove on the back of the key. Gently pry it open with a flathead screwdriver or coin to reveal a tiny CR2032 coin cell inside. Remember the orientation—don’t install it backward (the raised side usually faces up or has markings). Remove the old battery carefully to avoid scratching the circuit board. After pressing in the new battery, snap the case shut until you hear a click. Finally, test the remote lock button to confirm it works. The whole process takes about 5 minutes—keeping spare batteries at home is handy. I’ve replaced mine three times, saving trips to the dealership. Just apply moderate force when prying to avoid breaking the plastic clips (which could mean costly key repairs). Regular battery checks help prevent unexpected issues on the road.

[EmersynMarie]

Replacing the battery in your Besturn X40 key fob is a great little DIY project, and I find it quite enjoyable. Just use a coin or a nail file to gently pry open the casing along the edge. The battery model is CR2032, and you can easily find them online for just a few bucks each. Be careful not to dirty the electrodes when removing the old battery. Make sure the new battery is inserted in the correct orientation, and that satisfying click when you snap the cover back on is quite rewarding. I recommend doing this in a dry environment to avoid static electricity affecting the circuit. After replacement, test the button responsiveness—if it doesn’t work, check if the battery is inserted backward or if there’s poor contact. This task saves both time and money, and I do it once a year to keep my key fob working smoothly. A quick tip: avoid doing this in damp places to prevent short circuits. Developing the habit of DIY maintenance is much better than panicking when the battery dies unexpectedly.

[PiperFitz]

Replacing the battery for the Besturn X40 key is quite simple. First, locate the gap on the side of the key and gently pry it open with a thin tool. Remove the CR2032 battery inside, paying attention not to reverse the positive and negative poles. Press the new battery firmly into place, then close the casing and test the button functions. The whole process takes just two to three minutes—just be gentle to avoid damaging any parts. It's wise to keep spare batteries handy for convenience.

[SanRuth]

When replacing the battery for the Bestune X40 key, pay attention to safety details. I always choose a flat surface for the operation. There's a small gap on the key casing—apply controlled force when prying it open and avoid using sharp objects to prevent scratches. After removing the CR2032 battery, clean the slot thoroughly. Install the new battery in the correct orientation (usually with the marked side facing up) to prevent electrode reversal and malfunction. After securely closing the cover, test the remote function to ensure responsiveness. I recommend wearing gloves to reduce static electricity risks, as the key circuitry is delicate. Avoid replacing the battery too frequently—once every two years is ideal—to maintain the device and prevent unexpected malfunctions that could affect driving safety. Simple care can extend the key's lifespan.