The 8 D-Cell batteries that power the clock's weather mechanism can be a little prone to pushing up and against their cover plate. If the batteries are definitely sat in their cradle correctly and making good electrical connection then you don't have to worry. The cause of the slightly bulging covers are the tiny tolerances in the hand-welded connections between the backcover and the clock frame. In many clocks, the backcover is slightly low slung and so the attached battery covers lift slightly. We can confirm that the bulge has zero impact on the effective workings of the clock and, when the clock is hung and settles on its hook on the wall, it's quite likely that the backcover will lift backwards slightly, bringing it more in line with the height of the batteries.If you feel that the batteries aren't sitting in their cradle quite correctly and pop up easily then you can bend the springs slightly so that the batteries are held in place with more strength:It’s a simple fix: pull the spring up ever so slightly, as shown in the photo. The arm holding the spring can also, if needed, be bent slightly at the point marked 'x' in the photo so that the spring remains in an elevated position. This will prevent the batteries being push up rather than across.