On Tuesday, April 5, 2016 at 10:41:13 PM UTC-4, Ralph Mowery wrote:
"Rheilly Phoull" wrote in message
...

Have you got some dirt or oil/grease on the battery posts? That's what it
sounds like to me.

So when is grease on the terminals bad ??

When it gets between the battery post and the clamp.

If it is on the outside it is fine.

Conventional wisdom says when you tighten it down the grease gets squeezed out and there is direct metal to metal contact.

Whether that's based on data or not I don't know. But that's the way mechanics do it successfully.