Replace a key-fob coin battery
更换汽车遥控钥匙纽扣电池
Swap the exact coin-cell type without damaging the seal, buttons or immobiliser chip.
使用完全相同型号的纽扣电池，避免损坏密封、按键或防盗芯片。
Beginner · 5–10 min · Exact coin cell, plastic pry tool
1. Read the key manual
Confirm the cell type and opening notch. Work over a tray so the emergency key, spring or seal cannot fall away.
查看钥匙说明
确认电池型号和开启缺口；在托盘上操作，防止机械钥匙、弹簧或密封圈丢失。
2. Open with plastic
Remove the emergency key if required, insert a plastic pry tool at the notch and twist gently. Never force a screwdriver into the circuit board.
使用塑料工具打开
按需取出机械钥匙，在缺口插入塑料撬片轻轻旋转；不要把螺丝刀硬插向电路板。
3. Copy polarity
Photograph which side faces up, remove the old cell by its edge and fit the exact new type in the same orientation.
保持极性一致
拍下电池朝向，用边缘取出旧电池，并以相同方向装入完全相同型号的新电池。
4. Seal and test
Check the rubber seal sits flat, snap the case evenly, then test lock/unlock beside the car. Keep coin cells away from children.
合盖并测试
确认橡胶密封圈平整，均匀扣合外壳，再到车旁测试开锁和上锁；纽扣电池必须远离儿童。