rvshrinker wrote:
Last looked at these batteries one month ago. Today before our trip there is a small amount of blue green corroding at the terminal, and along 3 red wires connecting to it at their terminals.
Corrosion forming around lead acid battery terminals is from a small amount of gas that is leaking around the terminals. It is impossible to prevent this leakage as a battery ages. You can buy those pricey battery post "donuts" or just gob a large amount of Vaseline on the post and terminal/clamp. Remove the terminal so that the Vaseline get under the terminal/clamp right up close the the seam between the post and the case.
BEFORE YOU DO THIS, clean the terminals, cable ends and the ENTIRE BATTERY OUTSIDE CASE with baking soda and water. Rinse well with clear water.
rvshrinker wrote:
Also there is a small amount of sparking when the red wire is brought to the terminal. Never seen this before. What's going on?
If it is small, ignore it. It just means that something is turned on when you connect it.
