There is provided a packet routing apparatus for performing an IP additional function processing for a packet in the middle of a packet routing processing without damaging the high speed characteristic of the packet routing processing. The first battery cell has a first housing and first and second electrical terminals. The protective portion includes a temporary joint. Such power and signals are magnetically coupled to the inductive coupler portion in the casing or liner section and communicated to various electrical devices mounted outside the casing or liner section. The main pipe is then pierced by the adaptor’s tapping tee. The child bath seat can be suspended above or a portion of the bath seat can rest on the bottom surface of the bathtub.