The following comes from Warren: To check condition of any moderate-to-high current leads/connections, I like the measure-voltage-drop method. Eg: at battery terminal[s], put one vm lead on battery terminal itself & other lead on wire or connecting [crimped?] lug; do this while heavy charge/current is flowing.  Any more than maybe 0.1 volt = time to fix/clean/tighten. Can do same type…