Hi, I iknow someone dealt with this last time, but my battery is running out - I get the vibration after I see the time, and the hands keep getting incorrectly calibrated with the watch. What is the best way of changing the battery? I took it to a local jewler and they were not able to help because they could not get the back off. Do I need to send it to RNIB, or if I find a jewler in a high street in Worcester/Hereford, should they be able to do it? Andrew.