Electrical · Expert tip
Keep battery terminals clean and tight
Corroded terminals cause most "dead battery" calls.
The expert tip
- Disconnect the negative first, positive last
- Clean corrosion with a brush and baking-soda solution
- Tighten and protect with petroleum jelly
- Test voltage drop across the connections
Source: Battery & electrical experts
Apply tips that match your car and manual. For anything safety-critical or high-voltage, use a qualified mechanic.