Thanks Mr Boat, maybe I should of read the manual But still annoying that when it happens the battery goes flat.
Hi
I have a different problem, its the battery life. I've had the watch (405cx) for nearly a year, but just recently the battery power seems to go down really quick, it supposed to last 8 hours,fully charged, I'm only getting about 4 1/2! it used to last a lot longer than this. has this happened to anyone else, can the battery be changed?