How to Replace the Battery of a Bestune B70 Key?
2 Answers
Here are the steps to replace the battery of a Bestune B70 car key: 1. Press the circular button on the side of the car key and pull out the mechanical key. 2. Use a screwdriver to pry open the gap at the top of the key. 3. Take out the key circuit board, remove the old battery, place the new battery with the positive side facing up into the slot, and gently push the battery until it is completely secured. 4. Cover the key circuit board back onto the key, align the two separated halves of the key properly, press both sides of the key with your hands until the upper and lower parts are completely fitted together, then insert the mechanical key back into the key gap to complete the process.
The other day, I helped a colleague replace the battery in their Besturn B70 key, and it turned out to be super simple. For the mechanical key version, you first pull out the metal key, then insert a coin into the key slot and give it a gentle twist to open. For the smart key, you need to locate a small groove at the bottom and use a thin card to gently pry open the casing. The button battery inside is most likely a CR2032 model—just be careful not to install it upside down; the side with the plus sign should face up. While you're at it, clean the battery contacts with an eraser. When reassembling, listen for a click to ensure it's securely fastened. The whole battery replacement process takes just three minutes, saving you over half an hour of travel time to the dealership and more than 100 bucks.
