Car won’t start and battery won’t hold charge
2016 Ford Escape
Drove around 3:30-4:00 yesterday with no issue. Tried to start car around 6:00 and nothing. No lights and didn’t even try to crank. Jumped it and was able to get the engine running with no issue. Unhooked jumper cables and engine immediately died. Tried a second time and same thing. Called a friend who said it might be a dead cell in my battery. Pulled out battery and tested it, 12v reading. Lots of corrosion on both terminals but especially on negative. Also negative terminal was warm when unhooking battery. Positive was normal temperature with minimal corrosion. What could the issue be?
Edit: bought a wire brush meant specifically for battery connections and cleaned off all the corrosion. Hooked it back up and everything’s back to normal.