A battery holder in an electronic device includes a battery receptacle, a locking member, and at least one resilient member. A bed member is carried by the frame poles adapted for receiving and supporting a person. The hyperbranched polymer release fluids or agents may be used with a fuser member having a substrate, an outer layer covering the substrate, and a release coating on the outer layer, wherein the release coating includes a hyperbranched polymer. The present invention further relates to methods for the purification of the p-GlcNAc of the invention from microalgae, preferably diatom, starting sources.