Originally Posted by maxcichon
OK, I guess that all of the above apply, HOWEVER, the real purpose of
the red, non-conductive cover is to prevent accidental contact between this POSITIVE battery post ans any adjacent metal which would be GROUND. And, of course, the resulting sparks, burns and damage to personell and property.
Why does one suppose there is rarely a BLACK cover over the NEGATIVE post?

Thanks for considering my explanation. The Mechanic (idiot) placing tools on the battery consideration makes sense.
. A tool could easily ground the positve terminal to the body or the other battery terminal.....It's Interesting that safeguards replace common sense.
Your explanation that the cover prevents shorting to ground also explains why there is no negative cover. A cost accountant will save every penny he can.
if you prefer symmetry, and can purchase these covers, it would be wise to purchase two. With a good primer and black paint you can convert the red cover to black.(Do not place two red covers on the battery) Problems with paint adhering? Try urethane primer.