Batteries of failed SI units are now being replaced locally by Andrew Barber. This will be a much cheaper and convenient process than forwarding these by road transport to the Sportident agent in NSW. In the course of doing the first batch of replacements Andrew remarked that many failures were not of the battery itself but of the soldered wire joint between the battery and the SI unit. The likelhood of such failures would be increased by rough handling of the SI units. So please remember that although the SI units have a tough exterior they contain delicate electronics. Note also that the BSF7 units are no longer being produced by Sportident so we need to look after the ones we have.