Hi . Earlier in this thread, a gentleman pointed out the fact that there is a thin soft gasket around the battery unit that is a cushion and a seal for sound. The replacement batteries do not have this gasket and so it makes the noise you describe. If you still have the old battery , swap it over ( gasket) to the new battery. If you no longer have the old battery you can improvise with a very thin , foam rubber material cut to size and shape. The thickness is about equal to the thickness of a credit card.