How to Replace the Battery in a Changan Key?
4 Answers
Here are the detailed steps for replacing the battery in a Changan key: 1. Prepare the folding key and a small flathead screwdriver; 2. Open the key; 3. Insert the screwdriver into the key slot and pry upwards until it loosens; 4. Turn the key around and locate a small hole at the back, insert the screwdriver into the hole and pry upwards until the cover plate loosens, then remove the cover plate by hand; 5. After removing the cover plate, you will see the battery. Replace it with a new one and reattach the cover plate. The remote key system mainly consists of two parts: the transmitter and the receiver: 1. Transmitter: Composed of a transmission switch, transmission antenna (keypad), integrated circuit, etc. 2. Receiver: After the transmitter sends an identification code via shortwave modulation, the car's shortwave antenna receives it, and the distributor directs it into the receiver's electronic control unit for demodulation through a shortwave high-frequency amplifier processor, where it is compared with the demodulator's identification code.
Last time my Changan car key suddenly became unresponsive, so I replaced the battery myself—it was actually quite simple. Most Changan keys are remote-controlled folding types. First, find a small screwdriver or a hard card, locate a small gap along the edge of the key to pry open the casing, but don’t force it or you might damage the plastic. Then remove the old battery, paying attention to the positive and negative polarity. Remember, it’s a CR2032 coin cell battery, which can be bought for just a few yuan at supermarkets or online. When inserting the new battery, make sure the polarity is correct, press it gently to ensure good contact, and finally snap the casing back into place. The whole process takes less than 5 minutes and saves you the labor fee at the 4S shop. If the key buttons start responding slowly or require multiple presses to unlock, it’s time for a replacement. Regular checks can prevent power issues while driving.
I've helped friends replace the battery in their Changan car keys several times, and it's super easy. Before disassembling the key, prepare a CR2032 battery and a small pry tool - a coin can work in a pinch if you don't have one. Locate the small notch near the folding part of the key, then gently pry it open, being careful not to scratch the casing. After removing the old battery, check the printed model number to confirm it's CR2032. When installing the new battery, pay attention to the polarity markings to avoid putting it in backwards. You'll hear a click when properly closing the casing. DIY replacement saves time and money while teaching you a useful skill, preventing emergency situations when the battery dies. Replacement frequency varies - frequent users may need to change it every 6-12 months, while less active users might go 2 years between changes.
With twenty years of driving experience, I'm very familiar with changing the battery in a Changan key. The most obvious signs of a dead battery are unresponsive buttons or dimming lights. The disassembly method varies by model: some require unscrewing small screws, while others can be pried open directly to remove the back cover. Take out the old CR2032 battery, and be careful not to lose any small internal parts when installing the new one. After reassembly, test the remote buttons—if the light turns on, you're good to go. Doing it yourself is simple, quick, and extends the key's lifespan, so there's no need to waste money at a shop.
