HP 67: charging of battery pack

[d b]

The 67 is susceptible to this problem. I don't even trust clean contacts. Contacts are usually the problem; batteries have to be pretty bad off to cause this. There are several anti-corrosion, conductive grease products on the market. Every manufacturer of aluminum wire & cable has one as do most breaker suppliers. No Lox brand can be bought in about a one ounce tube here in the states. As they said about Brylcreem; a little dab'll do ya.

Or you could just charge your battery in your 35, 45, 70, or 80. They're impervious to this by design.