I've never seen this before. I have a 12v battery that turns the positive terminal black.
I removed the battery, cleaned the terminals, and charged it. Within a day or so the positive terminal turned black. The battery sat on the bench for 2-3 weeks. I then reinstalled it and tried to start the vehicle. No luck.
I pulled the battery again and went through the same clean and charge drill. Again, the terminal turned black within a day.
Any ideas? Is the battery toast? What causes this?
I removed the battery, cleaned the terminals, and charged it. Within a day or so the positive terminal turned black. The battery sat on the bench for 2-3 weeks. I then reinstalled it and tried to start the vehicle. No luck.
I pulled the battery again and went through the same clean and charge drill. Again, the terminal turned black within a day.
Any ideas? Is the battery toast? What causes this?