I have a couple of these Sealey digital verniers and both of them switch themselves on when not being used and left in their cases, resulting in short battery life. Sealey.JPG One does it all the time, the other isn't quite so bad. Neither of them have their original batteries installed, they have replacement ones fitted and I am wondering if it is a battery issue that is causing this ? Anyone got any ideas please ? TIA for any help.