SI have produced an interesting PDF document which explains the problems of predicting when a BSF8 control battery needs to be replaced. This is a fairly important decision since  unnecessary replacement costs the club around £15 but failure to spot a dying battery infuriates competitors at our event  by causing possible voiding of a course.

Planners and Event Organisers might get something useful from reading this since it explains what to watch out for when setting up the controls before an event.

Here it is:              When To Replace a Battery