For the past couple of days my Tissot vibrating watch has been erratic in its time keeping. I've also had difficulty in setting it to the correct time. Although it indicates by vibration that the hand is pointing at the appropriate hour, in fact it's pointing somewhere else entirely. Anyone else had this sort of thing happen? Is it likely to be the battery? I've had the watch since October which would indicate pretty poor battery life if it was that. Of course, it's still in warrantee so if it was something more major than that I could ask them to fix it. any input much appreciated.