How important is inter-cell connection resistance in batteries?

Experience shows that loose inter-cell connections that heat up and melt open are responsible for more battery failures than defective cells. This is a particular problem with lead-acid batteries that are frequently cycled, as the negative terminal may cold flow, thereby loosening the connection. Checking inter-cell connection resistance is, therefore, vitally important.

It is, however, essential to follow the correct sequence of test when working on multi-post batteries, and also to ensure that the instrument employs a method of testing that will provide valid results in this application.