Slight gaps between the Battery Base and ONE R’s other components after assembly is normal. The gaps are the result of ONE R’s waterproof O-rings being squeezed into place and are a sign that they are firmly sealed together. ONE R achieves waterproofing through localized protection of key components, which becomes effective when they are joined together. ONE R is waterproof up to 5 meters when fully assembled and installed in the Mounting Bracket.