Clean light corrosion from 12V battery terminals
清理 12V 电瓶端子的轻微腐蚀
Only for accessible conventional batteries with no swelling, leaking, cracks or special disconnect procedure.
仅适用于方便接近的普通电瓶；鼓包、泄漏、开裂或需要特殊断电程序时禁止操作。
Careful beginner · 25–35 min · Eye protection, gloves, terminal brush, spanner
1. Confirm disconnect is allowed
Read the manual first. Some cars require memory support, battery registration or a specific shutdown sequence; those vehicles should go to a workshop.
确认允许断电
先查阅手册；部分车辆需要记忆供电、电瓶注册或特定关机流程，这些车型应交给维修店。
2. Make it safe
Ignition off, key away from the car, parking brake on. Wear eye protection and gloves; remove metal jewellery. Ventilate the area.
安全准备
关闭点火，把钥匙带离车辆并拉紧手刹；佩戴护目镜和手套，摘下金属首饰，并保持通风。
3. Disconnect negative first
Disconnect NEGATIVE (−) first, isolate it, then POSITIVE (+). Brush only light dry corrosion using a battery-terminal cleaner or a small baking-soda/water paste, keeping liquid out of battery vents.
先拆负极
先拆负极（−）并隔离，再拆正极（+）；使用端子清洁剂或少量小苏打水糊刷除轻微干燥腐蚀，避免液体进入电瓶通气孔。
4. Reconnect positive first
Dry completely. Reconnect POSITIVE (+) first, then NEGATIVE (−), tighten to the manual specification and apply approved terminal protectant.
- Stop for acid liquid, swelling, cracks, heat, severe green corrosion or a loose battery case.
先接回正极
彻底干燥；先接回正极（+），再接负极（−），按手册要求紧固，并使用合格端子保护剂。