I’m sure anyone who’s ever jump-started a car, replaced a car battery, or built a small 12V DIY nipple-torture device has seen this: a powdery, white and blue and maybe sometimes green substance on battery terminals. What exactly is that crap? What causes it? Can you spread it on crackers and eat it? Let’s figure this…
Source: LifeHacker – Here’s The Deal With That White And Blue Crap On Your Car’s Battery Terminals