black discharge on battery
 

i noticed that there is black discharge all over my battery. Does this mean the battery is going bad?

Never seen any black discharge on a battery acid would turn to a white powder with a green tint on metal parts. Is it maybe battery cleaner or anti corrosion gel?

well it looks like dirty dired up oil.

my autozone yellow tops did that right before they died
I had never seen black residue on a battery before either maybe thats why most batteries are in black cases lol

Aren't these sealed batteries? I can't check mine as I replaced it a couple of years ago with a high capacity, deep discharge type usually used in public safety vehicles.

-- Chuck

maybe time for a new one then. what would be better, autozone redtop or yellowtop?

i always get the best warranty most cranking voltage myself

I think at Autozone their yellow top is the best (not to be confused with Optima yellow tops)

well i cleaned it off, the terminals were full of that white powdery stuff. But it seems to be cranking fine. but ill get a new one before its too late

just take it in and get it tested

Mine has the same thing. Many batteries do this. Wipe it off with a rag and some simple green.

If the battery is swelling up then replace it.