Now the clock ticks like a clock But another problem has revealed .... The RTC I'm using has arrived in a form of a module bought from eBay it has everything on it including an EEPROM ... But the thing is when I remove the primary power source it stops ticking , but I assume the 3V battery on it (it's full by the way 3.2V measured) would take the rebound as it should but it doesn't , I guess there is something I must set in the register which I can not see ... Any ideas ?